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| Area Code | Region | State / Territory | In Service Since |
|---|---|---|---|
| 201 | New Jersey (Bergen County and Hudson County) | NJ | 1947 |
| 202 | Washington, D.C. | DC | 1947 |
| 203 | Southwestern Connecticut (Bridgeport, Danbury, New Haven, Waterbury, and southwestern Connecticut) | CT | 1947 |
| 204 | Manitoba | MANITOBA, MB | 1947 |
| 205 | Alabama (Birmingham, Tuscaloosa, and parts of western and central Alabama) | AL | 1947 |
| 206 | Washington (Seattle area) | WA | 1947 |
| 207 | Maine (all except Estcourt Station) | ME | 1947 |
| 208 | Idaho | ID | 1947 |
| 209 | California (Stockton, Modesto, Merced, Tracy, San Andreas, and a part of central California extending into central Yosemite National Park) | CA | 1958 |
| 210 | Texas (San Antonio metropolitan area) | TX | 1992 |
| 212 | New York (New York City: Manhattan only, except for Marble Hill) | NY | 1947 |
| 213 | California (central area of Los Angeles) | CA | 1947 |
| 214 | Texas (Dallas metropolitan area) | TX | 1947 |
| 215 | Pennsylvania (Philadelphia area, including all of Philadelphia and its suburbs in eastern Montgomery County, most of Bucks County, and a very small portion of Berks County around the Hereford area, which is served by the Pennsburg 679 exchange) | PA | 1947 |
| 216 | Ohio (Cleveland area) | OH | 1947 |
| 217 | Illinois (Springfield, Champaign, Decatur, Urbana, Lincoln, and parts of central Illinois) | IL | 1947 |
| 218 | Minnesota (Duluth, Moorhead, Thief River Falls, Bemidji, Brainerd, International Falls, and most of northern Minnesota) | MN | 1947 |
| 219 | Indiana (Gary area) | IN | 1948 |
| 220 | Ohio (suburban Columbus, central Ohio outside of Franklin County) | OH | April 22, 2015 |
| 223 | Pennsylvania (Harrisburg, Gettysburg, Lancaster, York, and most of south-central Pennsylvania) | PA | September 26, 2017 |
| 224 | Illinois (North and northwest suburbs of Chicago) | IL | January 5, 2002 |
| 225 | Louisiana (Baton Rouge area and east-central Louisiana) | LA | August 17, 1998 |
| 226 | Ontario (London, Windsor, Kitchener-Waterloo, Cambridge, and most of southwestern Ontario) | ON, ONTARIO | October 21, 2006 |
| 227 | Maryland (Silver Spring; Washington, D.C., suburbs; all counties which touch the Potomac River; Hagerstown, Frederick, Rockville, Cumberland; and fixed-line telephones in western Maryland) | MD | June 14, 2023 |
| 228 | Mississippi (Gulfport, Biloxi, Pascagoula, Bay St. Louis, and southmost Mississippi) | MS | September 15, 1997 |
| 229 | Georgia (Albany, Valdosta, Bainbridge, Americus, Fitzgerald, and most of southwestern Georgia) | GA | August 1, 2000 |
| 231 | Michigan (Muskegon, Traverse City, Ludington, Petoskey, and a part of northwestern Michigan) | MI | June 5, 1999 |
| 234 | Ohio (Akron, Canton, Youngstown, Warren, and most of northeastern Ohio) | OH | October 30, 2000 |
| 235 | Missouri (Columbia, Jefferson City, Hannibal, Cape Girardeau, Farmington, Lake of the Ozarks, Poplar Bluff, and most of eastern Missouri excluding the St. Louis metropolitan area) | MO | March 24, 2024 |
| 236 | British Columbia (all, and the isolated border town of Hyder, Alaska, US) | BC, BRITISH COLUMBIA | June 1, 2013 |
| 239 | Florida (southwest coast: all of Lee County, Collier County, the mainland part of Monroe County, including Cape Coral, Fort Myers, Naples, and Everglades) | FL | March 11, 2002 |
| 240 | Maryland (Silver Spring; Washington, D.C., suburbs; all counties which touch the Potomac River; Hagerstown, Frederick, Rockville, Cumberland; and landline telephones in western Maryland) | MD | June 1, 1997 |
| 242 | The Bahamas (all) | BAHAMAS | October 1, 1996 |
| 246 | Barbados (all) | BARBADOS | July 1, 1996 |
| 248 | Michigan (Oakland County) | MI | May 10, 1997 |
| 249 | Ontario (Northeastern Ontario and Central Ontario: Greater Sudbury, Sault Ste. Marie, North Bay, etc.) | ON, ONTARIO | March 19, 2011 |
| 250 | British Columbia (Victoria: Prince George, Prince Rupert, Kelowna, all areas except for Metro Vancouver and the Fraser Valley; and the isolated border town of Hyder, Alaska, US) | BC, BRITISH COLUMBIA | October 19, 1996 |
| 251 | Alabama (Mobile County, Baldwin County, Bay Minette, Jackson, Brewton, Citronelle, and a part of southwestern Alabama) | AL | June 18, 2001 |
| 252 | North Carolina (Greenville, New Bern, Elizabeth City, Kinston, Outer Banks, Rocky Mount) | NC | March 22, 1998 |
| 253 | Washington (Tacoma, Lakewood, Auburn, Puyallup, Enumclaw, Spanaway, and the southern suburbs of Seattle) | WA | April 27, 1997 |
| 254 | Texas (Waco, Killeen, Temple, Belton, and Stephenville) | TX | May 25, 1997 |
| 256 | Alabama (Huntsville, Decatur, Cullman, Gadsden, Madison, Florence, Sheffield, Tuscumbia, Fort Payne, Scottsboro, and most of northern Alabama) | AL | March 23, 1998 |
| 257 | will overlay 778/236/672 (British Columbia) | BC, BRITISH COLUMBIA | May 24, 2025[3] |
| 260 | Indiana (Fort Wayne, New Haven, Decatur, Angola, Huntington, Wabash, and most of northeastern Indiana) | IN | January 15, 2002 |
| 262 | Wisconsin (Racine, Kenosha, Menomonee Falls, Waukesha, and most of southeastern Wisconsin excluding Milwaukee County) | WI | September 25, 1999 |
| 263 | Quebec (Montreal metropolitan area) | QC, QUEBEC | October 22, 2022 |
| 264 | Anguilla (all) | ANGUILLA | March 31, 1997 |
| 267 | Pennsylvania (Philadelphia and surrounding suburban area) | PA | July 1, 1999 |
| 268 | Antigua and Barbuda (all) | ANTIGUA/BARBUDA | April 1, 1996 |
| 269 | Michigan (Battle Creek, Kalamazoo, Benton Harbor, Allegan, Hastings, St. Joseph, and most of southwestern Michigan) | MI | July 13, 2002 |
| 270 | Kentucky (Owensboro, Paducah, Bowling Green, Hopkinsville, Henderson, Elizabethtown, and most of western Kentucky) | KY | April 19, 1999 |
| 272 | Pennsylvania (northeastern) | PA | October 21, 2013 |
| 274 | Wisconsin (Appleton, Sheboygan, Oshkosh, Green Bay, Manitowoc, Marquette, Fond du Lac, and parts of eastern Wisconsin—but not in Milwaukee County) | WI | May 5, 2023 |
| 276 | Virginia (Bristol, Abingdon, Wytheville, Martinsville, Bluefield, Big Stone Gap, and the remainder of southwestern Virginia) | VA | September 1, 2001 |
| 279 | California (the Sacramento Metropolitan Area) | CA | March 10, 2018 |
| 281 | Texas (Houston area) | TX | November 2, 1996 |
| 283 | Ohio (Cincinnati, Middletown, Hamilton, Lebanon, and parts of southern and southwestern Ohio) | OH | April 28, 2023 |
| 284 | British Virgin Islands (all) | BRITISH VIRGIN ISLANDS | October 1, 1997 |
| 289 | Ontario (Oshawa-Hamilton and Golden Horseshoe, excluding Toronto 416 but including its adjacent suburbs) | ON, ONTARIO | June 9, 2001 |
| 301 | Maryland (Silver Spring; Washington, D.C., suburbs; all counties which touch the Potomac River; Hagerstown, Frederick, Rockville, Cumberland; and land line telephones in western Maryland) | MD | 1947 |
| 302 | Delaware (all) | DE | 1947 |
| 303 | Colorado (Denver, Boulder, Longmont, Aurora, Golden, Limon, Littleton, Centennial; central Colorado) | CO | 1947 |
| 304 | West Virginia | WV | 1947 |
| 305 | Florida (all of Miami-Dade County and the Florida Keys) | FL | 1947 |
| 306 | Saskatchewan | SASKATCHEWAN, SK | 1947 |
| 307 | Wyoming (all) | WY | 1947 |
| 308 | Nebraska (North Platte, Scottsbluff, McCook, Kearney, Grand Island; western Nebraska) | NE | 1955 |
| 309 | Illinois (Peoria, Bloomington, Moline, Rock Island, Galesburg; west-central Illinois) | IL | 1957 |
| 310 | California (southwestern coastal and coastal-adjacent areas of Los Angeles County, including Beverly Hills, Brentwood, Malibu, Pacific Palisades, Redondo Beach, Santa Monica, Torrance, and Santa Catalina Island) | CA | November 2, 1991 |
| 312 | Illinois (downtown Chicago) | IL | 1947 |
| 313 | Michigan (Dearborn, the Grosse Pointes, Detroit, and the latter's enclaves of Hamtramck and Highland Park) | MI | 1947 |
| 314 | Missouri (St. Louis, St. Louis County, Florissant, Crestwood, Hazelwood, Kirkwood, and surrounding suburbs of St. Louis) | MO | 1947 |
| 315 | New York (Syracuse, Utica, Watertown; north-central New York) | NY | 1947 |
| 316 | Kansas (Wichita metro, McConnell AFB, Cheney, El Dorado, Mulvane, Newton) | KS | 1947 |
| 317 | Indiana (Indianapolis and immediate metro area including Carmel, Fishers, Noblesville, Westfield, Greenwood, Mooresville, Beech Grove, Plainfield, Avon, Brownsburg, and Zionsville) | IN | 1947 |
| 318 | Louisiana (Shreveport–Bossier City, Monroe, Alexandria, Fisher, Tallulah, and most of northern Louisiana) | LA | 1957 |
| 319 | Iowa (Cedar Rapids, Waterloo, Burlington, Iowa City; parts of eastern Iowa) | IA | 1947 |
| 320 | Minnesota (St. Cloud, Alexandria, Morris, Hutchinson, Sandstone, Appleton, Willmar; central Minnesota) | MN | March 17, 1996 |
| 321 | Florida (Orlando, Cocoa, Melbourne, Rockledge, Titusville, St Cloud, and east-central Florida) | FL | November 1, 1999 |
| 323 | California (Downtown Los Angeles and surrounding areas) | CA | June 13, 1998 |
| 324 | Florida (Jacksonville, St. Augustine, Starke, and most of northeastern Florida) | FL | February 26, 2024 |
| 325 | Texas (Abilene, San Angelo, Sweetwater, Snyder) | TX | April 5, 2003 |
| 326 | Ohio (Dayton, Springfield, and southwestern Ohio north and east of the Cincinnati metropolitan area) | OH | March 8, 2020 |
| 327 | Arkansas (Texarkana, Jonesboro, Pine Bluff; southern, eastern, and northeastern Arkansas) | AR | February 20, 2024 |
| 329 | New York (Dutchess, Orange, Putnam, Rockland, Sullivan, and Ulster counties) | NY | March 24, 2023 |
| 330 | Ohio (Akron, Canton, Youngstown, Warren, and most of northeastern Ohio) | OH | March 9, 1996 |
| 331 | Illinois (Aurora, Naperville, Oswego; western suburbs of Chicago) | IL | October 7, 2007 |
| 332 | New York (New York City: Manhattan only, except for Marble Hill) | NY | June 10, 2017 |
| 334 | Alabama (Montgomery, Auburn, Dothan, Enterprise, Eufaula, Opelika, Phenix City, Selma, Tuskegee, and most of southeastern Alabama) | AL | January 15, 1995 |
| 336 | North Carolina (the Piedmont Triad, Wilkesboro, Roxboro, and most of northwestern North Carolina) | NC | December 15, 1997 |
| 337 | Louisiana (Lafayette, Lake Charles, Leesville, New Iberia, Opelousas, and most of southwestern Louisiana) | LA | October 11, 1999 |
| 339 | Massachusetts (Canton, Hanson, Lincoln, Nahant, Plympton, Revere, Stoughton, Winchester, and east-central Massachusetts) | MA | May 2, 2001 |
| 340 | U.S. Virgin Islands (all) | VI | June 1, 1997 |
| 341 | California (coastal regions of the East Bay—Oakland, Fremont, Hayward, Richmond, Berkeley, and Alameda) | CA | July 22, 2019 |
| 343 | Ontario (Ottawa metropolitan area and southeastern Ontario) | ON, ONTARIO, QC | May 17, 2010 |
| 345 | the Cayman Islands (all) | CAYMAN ISLANDS | September 1, 1996 |
| 346 | Texas (Houston area) | TX | July 1, 2014 |
| 347 | New York (New York City: The Bronx, Brooklyn, Queens, Staten Island, and Marble Hill) | NY | October 1, 1999 |
| 350 | California (Stockton, Modesto, Merced, Tracy, San Andreas, and a part of central California extending into central Yosemite National Park) | CA | November 28, 2022 |
| 351 | Massachusetts (Ashby, Barre, Boxborough, Carlisle, Groveland, Rowley, Wendell, Wenham, and northeastern Massachusetts) | MA | May 2, 2001 |
| 352 | Florida (Gainesville, Ocala, Inverness, Dunnellon, and a part of central Florida) | FL | December 3, 1995 |
| 353 | Wisconsin (Madison, La Crosse, Platteville, Beloit, and most of southwestern Wisconsin) | WI | September 15, 2023 |
| 354 | Quebec (central southern Quebec; surrounding City of Montreal) | QC, QUEBEC | October 22, 2022 |
| 357 | CA | CA | 2025-03-26 |
| 360 | Washington (Olympia, Vancouver, Bellingham, Bremerton, Port Angeles, Aberdeen, and most of western Washington, except the Seattle metropolitan area) | WA | January 15, 1995 |
| 361 | Texas (Corpus Christi, Victoria, George West, and much of south Texas) | TX | February 13, 1999 |
| 363 | New York (Nassau County, including Hempstead and Mineola) | NY | January 20, 2023 |
| 364 | Kentucky (Owensboro, Paducah, Bowling Green, Hopkinsville, Henderson, Elizabethtown, and most of western Kentucky) | KY | March 3, 2014 |
| 365 | Ontario (Oshawa-Hamilton and the Golden Horseshoe, excluding Toronto's 416 but including its adjacent suburbs) | ON, ONTARIO | March 25, 2013 |
| 367 | Quebec (Quebec City, Saguenay, the Gaspé Peninsula, Côte-Nord, Chibougamau, St-Georges), Maine (Estcourt Station) | QC, QUEBEC | November 24, 2018 |
| 368 | Alberta (all) | AB, ALBERTA | April 23, 2022 |
| 369 | California (Vallejo, Crescent City, Eureka, Redwoods National Park, Santa Rosa, Ukiah, and most of northwestern California) | CA | February 1, 2023 |
| 380 | Ohio (Columbus and Franklin County) | OH | February 27, 2016 |
| 382 | Ontario (London, Windsor, Kitchener-Waterloo, Cambridge, and most of southwestern Ontario) | ON, ONTARIO | June 17, 2023 |
| 385 | Utah (Counties of Davis; Morgan; Salt Lake; Utah; and Weber along the Wasatch Front, including the cities of Salt Lake City, Ogden, and Provo) | UT | March 29, 2009 |
| 386 | Florida (Daytona Beach, Lake City, Live Oak, Crescent City, and parts of northeastern Florida) | FL | February 15, 2001 |
| 401 | Rhode Island (all) | RI | 1947 |
| 402 | Nebraska (Omaha, Lincoln, Norfolk, Superior, and most of eastern Nebraska) | NE | 1947 |
| 403 | Alberta (Calgary, Banff, Red Deer, Medicine Hat, Lethbridge, Brooks, and most of southern Alberta) | AB, ALBERTA | 1947 |
| 404 | Georgia (Atlanta and the Atlanta metropolitan area inside of the Interstate 285 perimeter highway) | GA | 1947 |
| 405 | Oklahoma (Oklahoma City, Stillwater, Edmond, Norman, Shawnee, and most of central Oklahoma) | OK | 1947 |
| 406 | Montana (all) | MT | 1947 |
| 407 | Florida (Orlando, Sanford, St. Cloud, Kissimmee, and a part of east-central Florida) | FL | April 16, 1988 |
| 408 | California (San Jose, Cupertino, Los Altos, Los Altos Hills, Los Gatos, Milpitas, Mountain View, Santa Clara, Sunnyvale, and Silicon Valley) | CA | 1959 |
| 409 | Texas (Beaumont, Galveston, Orange, Port Arthur, and Texas City) | TX | November 1, 1982 |
| 410 | Maryland (all counties and cities which touch the Chesapeake Bay, the Atlantic Ocean, or Delaware, except for St. Mary's County (in 301)) | MD | October 6, 1991 |
| 412 | Pennsylvania (Pittsburgh region) | PA | 1947 |
| 413 | Western part of Massachusetts | MA | 1947 |
| 414 | Wisconsin (Milwaukee County includes cities of Milwaukee, West Allis, Oak Creek, and others) | WI | 1947 |
| 415 | California (San Francisco, Daly City, Brisbane, and most of Marin County) | CA | 1947 |
| 416 | Ontario (the City of Toronto) | ON, ONTARIO | 1947 |
| 417 | Missouri (Springfield, Joplin, Branson, Lamar, Lebanon, and most of southwestern Missouri) | MO | 1950 |
| 418 | Quebec (Quebec City, Saguenay, the Gaspé Peninsula, Côte-Nord, Chibougamau, St-Georges), Maine (Estcourt Station) | QC, QUEBEC | 1947 |
| 419 | Ohio (Toledo area and most of northwestern Ohio) | OH | 1947 |
| 423 | Tennessee (two discontiguous portions of East Tennessee in the northeast and in the southeast) | TN | September 11, 1995 |
| 424 | California (southwestern coastal and coastal-adjacent areas of Los Angeles County; also Santa Catalina Island) | CA | August 26, 2006 |
| 425 | Washington (northern and eastern suburbs of Seattle) | WA | April 27, 1997 |
| 428 | New Brunswick | NB, NEW BRUNSWICK | April 29, 2023 |
| 430 | Texas | TX | February 15, 2003 |
| 431 | Manitoba | MANITOBA, MB | November 3, 2012 |
| 432 | Western Texas (West Texas: Midland, Odessa, Big Spring, Alpine, Fort Stockton) | TX | April 5, 2003 |
| 434 | Virginia (Charlottesville, Lynchburg, Danville, and south-central Virginia) | VA | June 1, 2001 |
| 435 | Most of Utah outside the Salt Lake City, Ogden, and Provo metropolitan areas in northern Utah | UT | September 21, 1997 |
| 436 | Ohio (surrounding Cleveland on three sides, including: Elyria, Lorain, Oberlin, Ashtabula, and most of north-central Ohio) | OH | March 1, 2024 |
| 437 | Ontario (Toronto metropolitan area) | ON, ONTARIO | March 25, 2013 |
| 438 | Quebec (Montreal metropolitan area) | QC, QUEBEC | November 4, 2006 |
| 440 | Ohio (surrounding Cleveland on three sides, including: Elyria, Lorain, Oberlin, Ashtabula, and most of north-central Ohio) | OH | August 16, 1997 |
| 441 | Bermuda (all) | BERMUDA | October 1, 1995 |
| 442 | California (most of the desert and mountain portions of the southeastern two-thirds of California) | CA | November 21, 2009 |
| 443 | Maryland | MD | June 1, 1997 |
| 445 | overlay of 215 and 267 (Philadelphia, Pennsylvania) | PA | March 3, 2018 |
| 447 | Illinois (Springfield, Champaign, Decatur, Urbana, Lincoln, and parts of central Illinois) | IL | March 27, 2021 |
| 448 | The Florida Panhandle | FL | June 22, 2021 |
| 450 | Quebec (central southern Quebec; surrounds City of Montreal) | QC, QUEBEC | June 13, 1998 |
| 457 | Louisiana (Shreveport–Bossier City, Monroe, Alexandria, Fisher, Tallulah, and most of northern Louisiana) | LA | September 25, 2025[11] |
| 458 | Oregon (Eugene, Medford, Bend, Pendleton, Corvallis, Ontario, Burns; excludes the Portland metropolitan area) | OR | February 10, 2010 |
| 463 | Indiana (Indianapolis and immediate metro area including Carmel, Fishers, Noblesville, Westfield, Greenwood, Mooresville, Beech Grove, Plainfield, Avon, Brownsburg, and Zionsville) | IN | November 15, 2016 |
| 464 | Illinois (western and southern portions of suburban Cook County and far eastern sections of Will County and southern and near western suburbs of Chicago) | IL | January 21, 2022 |
| 465 | not in use; available for geographic assignment | NY | 2026-06-18 |
| 468 | Quebec (Western Québec, except Montréal 514 and surrounding area 450: a large area including Abitibi-Témiscamingue, Estrie, Mauricie, Outaouais, Sherbrooke, and Trois-Rivières) | QC, QUEBEC | October 22, 2022 |
| 469 | Texas (Dallas metropolitan area) | TX | July 1, 1999 |
| 470 | Georgia (Metro Atlanta) | GA | February 26, 2010 |
| 471 | not in use; available for geographic assignment | MS | 2026-01-30 |
| 472 | North Carolina (Fayetteville, Wilmington, Fort Liberty, Seymour Johnson Air Force Base, Jacksonville, Lumberton, and much of southeastern North Carolina) | NC | October 7, 2022 |
| 473 | Grenada (all) | GRENADA | October 31, 1997 |
| 474 | Saskatchewan | SASKATCHEWAN, SK | October 2, 2021 |
| 475 | Southwestern Connecticut (Bridgeport, Danbury, New Haven, Waterbury, and southwestern Connecticut) | CT | December 12, 2009 |
| 478 | Georgia (Macon, Warner Robins, Swainsboro, Milledgeville, Perry, and a part of central Georgia) | GA | August 1, 2000 |
| 479 | Arkansas (Fort Smith, Fayetteville, Rogers, and most of northwestern Arkansas) | AR | January 19, 2002 |
| 480 | Arizona (Phoenix metropolitan area; primarily the East Valley) | AZ | March 1, 1999 |
| 483 | AL | AL | 2026-02-23 |
| 484 | Pennsylvania (Chester, Lehigh Valley, Norristown, Reading; parts of southeastern Pennsylvania) | PA | June 5, 1999 |
| 500 | personal communications services | NANP AREA | May 19, 1994 |
| 501 | Arkansas (Little Rock, Hot Springs, and much of central Arkansas, but not Pine Bluff) | AR | 1947 |
| 502 | Kentucky (Louisville, Frankfort, Shelbyville, Bardstown, and most of north-central Kentucky) | KY | 1947 |
| 503 | Oregon (Portland, Salem, Hillsboro, Beaverton, St. Helens, Tillamook, Astoria, and most of northwestern Oregon) | OR | 1947 |
| 504 | Louisiana (New Orleans metropolitan area) | LA | 1947 |
| 505 | New Mexico (Albuquerque, Santa Fe, Farmington, Gallup, and all of northwestern New Mexico, and a part of central New Mexico) | NM | 1947 |
| 506 | New Brunswick (all) | NB, NEW BRUNSWICK | 1955 |
| 507 | Minnesota (Rochester, Mankato, Austin, Marshall, Winona, and most of southern Minnesota) | MN | 1954 |
| 508 | Massachusetts (Berkley, Dennis, Douglas, Easton, Edgartown, Oakham, Oxford, Upton, and southeastern Massachusetts) | MA | July 16, 1988 |
| 509 | Washington (all of eastern Washington, including Spokane, Ellensburg, Pullman, the Tri-Cities area, Walla Walla, Wenatchee, and Yakima) | WA | 1956 |
| 510 | California (coastal regions of the East Bay: Oakland, Fremont, Hayward, Richmond, Berkeley, and Alameda) | CA | September 2, 1991 |
| 512 | Texas (Austin, San Marcos, and parts of central Texas) | TX | 1947 |
| 513 | Ohio (Cincinnati, Middletown, Hamilton, Lebanon, and parts of southern and southwestern Ohio; this area code used to also include Dayton) | OH | 1947 |
| 514 | Quebec (Montreal metropolitan area) | QC, QUEBEC | 1947 |
| 515 | Iowa (Des Moines, Ames, Fort Dodge, Jefferson, Indianola, and most of north-central Iowa) | IA | 1947 |
| 516 | New York (Nassau County, including Hempstead and Mineola) | NY | 1951 |
| 517 | Michigan (Lansing, Jackson, Charlotte, Deerfield, Addison, and most of south-central Michigan) | MI | 1947 |
| 518 | New York (Albany, Schenectady, Plattsburgh, Saranac Lake, Lake George, Westport, and most of northeastern New York) | NY | 1947 |
| 519 | Ontario (London, Windsor, Kitchener-Waterloo, Cambridge, Brantford, Guelph, and most of southwestern Ontario) | ON, ONTARIO | 1953 |
| 520 | Arizona (Tucson, Nogales, Fort Huachuca, and most of southeastern Arizona) | AZ | March 19, 1995 |
| 522 | personal communications services | NANP AREA | August 1, 2016 |
| 530 | California (Redding, Auburn, Chico, Davis, the California shore of Lake Tahoe, Placerville, Susanville, Truckee, Yreka, and most of northeastern California) | CA | November 1, 1997 |
| 531 | Nebraska (Omaha, Lincoln, Norfolk, Superior, and most of eastern Nebraska) | NE | March 26, 2011 |
| 532 | not in use; available for personal communications services | NANP AREA | 2024-11-04 |
| 533 | personal communications services | NANP AREA | September 26, 2009 |
| 534 | Wisconsin | WI | August 14, 2010 |
| 538 | not in use; available for personal communications services | NANP AREA | 2025-10-28 |
| 539 | Oklahoma (Tulsa, Bartlesville, McAlester, Muskogee, Henryetta, and northeastern Oklahoma) | OK | April 1, 2011 |
| 540 | Virginia (Fredericksburg, Roanoke, Blacksburg, Harrisonburg, Lexington, Staunton, Winchester, and parts of north-central Virginia) | VA | July 15, 1995 |
| 541 | Oregon (Eugene, Bend, Corvallis, Medford, Pendleton, and all of Oregon, except metropolitan northwestern Oregon, including Portland, Salem, Astoria, etc.) | OR | November 5, 1995 |
| 544 | personal communications services | NANP AREA | December 15, 2010 |
| 548 | Ontario (London, Windsor, Kitchener-Waterloo, Cambridge, and most of southwestern Ontario) | ON, ONTARIO | June 4, 2016 |
| 551 | New Jersey (Bergen County and Hudson County) | NJ | December 29, 2001 |
| 557 | Missouri (St. Louis, St. Louis County, Florissant, Crestwood, Hazelwood, Kirkwood, and surrounding suburbs of St. Louis) | MO | August 12, 2022 |
| 559 | California (Fresno, Hanford, Madera, Tulare, Visalia, and parts of the San Joaquin Valley | CA | November 14, 1998 |
| 561 | Florida (Palm Beach County, including Palm Beach, West Palm Beach, Boca Raton, Boynton Beach, etc.) | FL | May 13, 1996 |
| 562 | California (Downey, Long Beach, Whittier, Norwalk, La Habra, Lakewood, Pico Rivera, and most of southeastern Los Angeles County) | CA | January 25, 1997 |
| 563 | Iowa (Davenport, Dubuque, Clinton, Bettendorf, and most of eastern and northeastern Iowa) | IA | March 25, 2001 |
| 564 | Washington (Olympia, Vancouver, Bellingham, Bremerton, Port Angeles, Aberdeen, and all of western Washington) | WA | August 28, 2017 |
| 566 | personal communications services | NANP AREA | April 17, 2012 |
| 567 | Ohio (Northwest) | OH | January 1, 2002 |
| 570 | Pennsylvania (the Wyoming Valley, including Scranton and Wilkes-Barre; Bloomsburg; Danville; Nanticoke; Williamsport; and most of northeastern Pennsylvania) | PA | December 5, 1998 |
| 571 | Virginia (Washington, D.C. suburbs, including Arlington and Alexandria) | VA | March 1, 2000 |
| 572 | Oklahoma (Oklahoma City, Stillwater, Edmond, Norman, Shawnee, and most of central Oklahoma) | OK | May 24, 2021 |
| 573 | Missouri (Columbia, Jefferson City, Hannibal, Cape Girardeau, Farmington, Lake of the Ozarks, Poplar Bluff, and most of eastern Missouri excluding the St. Louis metropolitan area) | MO | January 7, 1996 |
| 574 | Indiana (South Bend, Elkhart, Goshen, Logansport, and most of north-central Indiana) | IN | January 15, 2002 |
| 575 | New Mexico (Las Cruces, Roswell, Carlsbad Caverns National Park, Socorro, Taos, and Truth or Consequences; excludes central (Albuquerque and its suburbs) and northwestern New Mexico) | NM | October 7, 2007 |
| 577 | personal communications services | NANP AREA | March 27, 2014 |
| 579 | Quebec (central southern Quebec; surrounds City of Montreal) | QC, QUEBEC | August 21, 2010 |
| 580 | Oklahoma (Ponca City, Ada, Ardmore, Enid, Lawton, Elk City, and most of southern and western Oklahoma) | OK | November 1, 1997 |
| 581 | Quebec (Quebec City, Saguenay, the Gaspé Peninsula, Côte-Nord, Chibougamau, St-Georges), Maine (Estcourt Station) | QC, QUEBEC | September 19, 2008 |
| 582 | Pennsylvania (Erie, State College, Altoona, Clearfield, Emporium, Johnsonburg, Johnstown, Meyersdale, Ridgway, Somerset, and most of northwestern and parts of central Pennsylvania) | PA | May 1, 2021 |
| 584 | Manitoba | MANITOBA, MB | October 29, 2022 |
| 585 | New York (Rochester, Batavia, and much of western New York) | NY | November 15, 2001 |
| 586 | Michigan (Macomb County) | MI | September 22, 2001 |
| 587 | Alberta (all) | AB, ALBERTA | September 19, 2008 |
| 588 | personal communications services | NANP AREA | September 9, 2015 |
| 601 | Mississippi (Jackson, Hattiesburg, Meridian, Natchez, Vicksburg, and most of central Mississippi) | MS | 1947 |
| 602 | Arizona (Phoenix metropolitan area; primarily the city of Phoenix) | AZ | 1947 |
| 603 | New Hampshire (all) | NH | 1947 |
| 604 | British Columbia (Metro Vancouver Regional District, Fraser Valley Regional District, Whistler, and the remaining portion of 604 not part of an overlay complex) | BC, BRITISH COLUMBIA | 1947 |
| 605 | South Dakota (all) | SD | 1947 |
| 606 | Kentucky (Ashland, Pikeville, Hazard, Somerset, London, Corbin, Maysville, and much of eastern Kentucky) | KY | 1955 |
| 607 | New York (Binghamton, Elmira, Cortland, Norwich, Ithaca, and most of south-central New York) | NY | 1954 |
| 608 | Wisconsin (Madison, La Crosse, Platteville, Beloit, and most of southwestern Wisconsin) | WI | 1955 |
| 609 | New Jersey (Trenton, Atlantic City, Princeton, and most of central & southeastern New Jersey) | NJ | 1956 |
| 610 | Pennsylvania (Chester, Lehigh Valley, Norristown, Reading; parts of southeastern Pennsylvania) | PA | January 8, 1994 |
| 612 | Minnesota (Minneapolis, Fort Snelling, St. Anthony, and Richfield) | MN | 1947 |
| 613 | Ontario (Ottawa metropolitan area and southeastern Ontario) | ON, ONTARIO, QC | 1947 |
| 614 | Ohio (Columbus and Franklin County) | OH | 1947 |
| 615 | Tennessee (Northern Middle Tennessee including Nashville[12]) | TN | 1954 |
| 616 | Michigan (Grand Rapids, Greenville, Holland, Ionia, Zeeland, and most of southwestern Michigan) | MI | 1947 |
| 617 | Massachusetts (Belmont, Brookline, Chelsea, Everett, Milton, Quincy, Watertown, Winthrop, and close-in Boston suburbs) | MA | 1947 |
| 618 | Illinois (Carbondale, Alton, Belleville, Cahokia, Centralia, Edwardsville, Marion, Metropolis, Vandalia, and most of southern Illinois) | IL | 1947 |
| 619 | California (San Diego and suburbs) | CA | 1982 |
| 620 | Kansas (southern Kansas not including the Wichita Metropolitan Area) | KS | February 3, 2001 |
| 621 | Texas (Houston). Approved to overlay 281, 346, 713, and 832 | TX | January 3, 2025[13] |
| 623 | Arizona (Phoenix metropolitan area; primarily the West Valley) | AZ | March 1, 1999 |
| 624 | Western New York state (Buffalo, Niagara Falls, Olean) | NY | November 16, 2023 |
| 626 | California (San Gabriel Valley) | CA | June 14, 1997 |
| 628 | California (San Francisco) and Marin County | CA | March 21, 2015 |
| 629 | Tennessee (Middle Tennessee, including Nashville and surrounding area) | TN | March 28, 2015 |
| 630 | Illinois (western suburbs of Chicago, including DuPage, central and southern Kane, northern Kendall, far northern Will, and small portions of Cook counties) | IL | August 3, 1996 |
| 631 | New York (Suffolk County on Long Island) | NY | November 1, 1999 |
| 636 | Missouri (St. Charles, Chesterfield, Union, Troy, and parts of east-central Missouri) | MO | May 22, 1999 |
| 639 | Saskatchewan | SASKATCHEWAN, SK | May 25, 2013 |
| 640 | New Jersey (Trenton, Atlantic City, Princeton, and most of central & southeastern New Jersey) | NJ | September 17, 2018 |
| 641 | Iowa (Mason City, Oskaloosa, Creston, Pella, Ottumwa, Britt, Clear Lake, Fairfield, and parts of central Iowa) | IA | July 9, 2000 |
| 645 | Florida (Miami-Dade County and the Florida Keys) | FL | August 4, 2023 |
| 646 | New York (New York City: Manhattan only, except for Marble Hill) | NY | July 1, 1999 |
| 647 | Ontario (Toronto) | ON, ONTARIO | March 5, 2001 |
| 649 | The Turks and Caicos Islands (all) | TURKS & CAICOS ISLANDS | June 1, 1997 |
| 650 | California (Daly City, South San Francisco, Palo Alto, Redwood City, Menlo Park, Mountain View, San Mateo, Santa Clara) | CA | August 2, 1997 |
| 651 | Minnesota (St. Paul, Eagan, Lindstrom, Red Wing, Hastings, Stillwater, and a part of east-central Minnesota) | MN | July 12, 1998 |
| 656 | Florida (all of Hillsborough County, including Tampa and its suburbs, MacDill Air Force Base, and Plant City, and also the inland areas of Pasco County and Oldsmar in Pinellas County[14]) | FL | February 22, 2022 |
| 657 | California (Northern Orange County: Anaheim, Fullerton, Garden Grove, Huntington Beach, Orange, Santa Ana, and portions Newport Beach and Costa Mesa) | CA | September 23, 2008 |
| 658 | Jamaica | JAMAICA | April 30, 2019 |
| 659 | Alabama (Birmingham, Tuscaloosa, and parts of western and central Alabama) | AL | November 12, 2019 |
| 660 | Missouri (Sedalia, Kirksville, Maryville, Mexico, Whiteman Air Force Base, and a part of north-central Missouri) | MO | October 12, 1997 |
| 661 | California (Northern Los Angeles County, including Lancaster, Palmdale, and Santa Clarita; and most of Kern County, including Bakersfield, Mojave, and Edwards Air Force Base) | CA | February 13, 1999 |
| 662 | Mississippi (Tupelo, Columbus, Corinth, Greenville, Greenwood, Starkville, and most of northern Mississippi) | MS | April 19, 1999 |
| 664 | Montserrat (all) | MONTSERRAT | July 1, 1996 |
| 667 | Maryland | MD | March 24, 2012 |
| 669 | California (San Jose) | CA | November 20, 2012 |
| 670 | Northern Mariana Islands | CNMI, NN | July 1, 1997 |
| 671 | Guam (includes Andersen Air Force Base) | GU | July 1, 1997 |
| 672 | British Columbia, and the isolated border town of Hyder, Alaska, US | BC, BRITISH COLUMBIA | May 4, 2019 |
| 678 | Georgia (Metro Atlanta) | GA | January 6, 1998 |
| 679 | a planned overlay of 313 | MI | November 7, 2025[18] |
| 680 | New York (Syracuse, Utica, Watertown, and north-central New York) | NY | March 11, 2017 |
| 681 | West Virginia | WV | March 28, 2009 |
| 682 | Texas (Fort Worth area) | TX | October 7, 2000 |
| 683 | Ontario (Northeastern Ontario and Central Ontario: Greater Sudbury, Sault Ste. Marie, North Bay, etc.) | ON, ONTARIO | June 18, 2022 |
| 684 | American Samoa (the former country code for this possession and unorganized territory of the United States) | AS | October 2, 2004 |
| 686 | Virginia (the Richmond Metropolitan Area, including Petersburg and the Northern Neck and Middle Peninsula) | VA | February 1, 2024 |
| 689 | Florida (Orlando, Sanford, St. Cloud, Kissimmee, and a part of east-central Florida) | FL | June 4, 2019 |
| 700 | Implemented for carrier internal use | NANP AREA | 1984 |
| 701 | North Dakota (all) | ND | 1947 |
| 702 | Nevada (almost all of Clark County, including all of the Las Vegas Valley, including Henderson and Boulder City) | NV | 1947 |
| 703 | Virginia (Northern Virginia: mostly the suburbs of Washington, D.C., including Alexandria, Arlington County, Fairfax County, Prince William County, and eastern Loudoun County) | VA | 1947 |
| 704 | North Carolina (Charlotte, Concord, Gastonia, Salisbury, and much of south-central North Carolina) | NC | 1947 |
| 705 | Ontario (Northeastern Ontario and Central Ontario: Greater Sudbury, Sault Ste. Marie, North Bay, etc.) | ON, ONTARIO | 1957 |
| 706 | Georgia (Athens, Augusta, Columbus, Calhoun, Dalton, Rome, and much of northwestern, northeastern and eastern Georgia, with an exclave in midwestern Georgia) | GA | May 3, 1992 |
| 707 | California (Vallejo, Crescent City, Eureka, Redwoods National Park, Santa Rosa, Ukiah, and most of northwestern California) | CA | 1959 |
| 708 | Illinois (western and southern portions of suburban Cook County and far eastern sections of Will County | IL | November 11, 1989 |
| 709 | Newfoundland and Labrador (all) | NEWFOUNDLAND AND LABRADOR, NL | 1962 |
| 712 | Iowa (Sioux City, Council Bluffs, Denison, and most of western Iowa) | IA | 1947 |
| 713 | Texas (Houston area) — overlays with 281, 346, and 832 | TX | 1947 |
| 714 | California (Northern Orange County: Anaheim, Fullerton, Garden Grove, Huntington Beach, Orange, Santa Ana, and portions of Newport Beach, Costa Mesa, and Tustin) | CA | 1951 |
| 715 | Wisconsin (Wausau, Eau Claire, Rhinelander, and most of northern Wisconsin) | WI | 1947 |
| 716 | New York (Buffalo, Niagara Falls, Olean, and parts of western New York) | NY | 1947 |
| 717 | Pennsylvania (Harrisburg, Gettysburg, Lancaster, York, and most of south-central Pennsylvania) | PA | 1947 |
| 718 | New York (New York City: The Bronx, Brooklyn, Queens, Staten Island, and Marble Hill) | NY | September 1, 1984 |
| 719 | Colorado (Colorado Springs, Pueblo, Florence, Leadville, Limon, Trinidad, La Junta, and most of southeastern Colorado) | CO | March 5, 1988 |
| 720 | Colorado (Denver, Boulder, Longmont, Aurora, Golden, Limon, Centennial; central Colorado) | CO | June 1, 1998 |
| 721 | Sint Maarten (all) | SINT MAARTEN | September 30, 2011 |
| 724 | Pennsylvania (Washington, Greensburg, Indiana, New Castle, Uniontown, Butler, and the majority of Southwestern Pennsylvania outside of Pittsburgh's Allegheny County) | PA | February 1, 1998 |
| 725 | Nevada (almost all of Clark County, including all of the Las Vegas Valley, including Henderson, and Boulder City) | NV | June 3, 2014 |
| 726 | Texas (San Antonio metropolitan area) | TX | October 23, 2017 |
| 727 | Florida (all of Pinellas County (except Oldsmar which uses area codes 656 and 813),[14] including St. Petersburg, Clearwater, Dunedin, Palm Harbor, Tarpon Springs, and the coastal parts of Pasco County) | FL | July 1, 1998 |
| 728 | Florida (Palm Beach County, including Palm Beach, West Palm Beach, Boca Raton, Boynton Beach, etc.) | FL | March 10, 2023 |
| 729 | planned for use in Tennessee | TN | March 5, 2025 |
| 730 | Illinois (Carbondale, Alton, Belleville, Cahokia, Centralia, Edwardsville, Marion, Metropolis, Vandalia, and most of southern Illinois) | IL | July 7, 2023 |
| 731 | Tennessee (most of West Tennessee, excluding Metropolitan Memphis and Shelby County (area code 901), but including Dyersburg, Jackson, Martin, Paris, Union City, and Crockett County) | TN | February 12, 2001 |
| 732 | New Jersey (New Brunswick, Lakewood, Neptune, Fort Dix, and most of east-central New Jersey) | NJ | June 1, 1997 |
| 734 | Michigan (Ann Arbor, Hell, Monroe, Plymouth, Romulus, Wayne, Ypsilanti, and the southwestern suburbs of Detroit) | MI | December 13, 1997 |
| 737 | Texas (Austin and suburbs) | TX | July 1, 2013 |
| 738 | California (nearly the entire city of Los Angeles outside of the San Fernando Valley and smaller cities and unincorporated areas of Los Angeles County immediately to the south or east) | CA | November 1, 2024 |
| 740 | Ohio (suburban Columbus, central Ohio outside of Franklin County, excluding the Marysville area, together with southeastern Ohio: Athens, Lancaster, Cambridge, Delaware, Ironton, Marietta, Mt. Vernon, Newark, Portsmouth, Steubenville, Washington Court House, and Zanesville) | OH | December 6, 1997 |
| 742 | Ontario (Niagara Falls Region, Hamilton, St. Catharines, suburbs of the Greater Toronto Area, and southeastern Ontario) | ON, ONTARIO | October 16, 2021 |
| 743 | North Carolina | NC | May 23, 2016 |
| 747 | California (the San Fernando Valley portion of Los Angeles County, including Burbank, Canoga Park, Encino, Glendale, North Hollywood, Northridge, Panorama City, Reseda, San Fernando, Sylmar, Tarzana, Van Nuys, and Woodland Hills) | CA | May 18, 2009 |
| 748 | Northern and Western Colorado | CO | 2026 |
| 753 | Ontario (Ottawa metropolitan area and southeastern Ontario) | ON, ONTARIO, QC | March 26, 2022 |
| 754 | Florida | FL | August 1, 2001 |
| 757 | Virginia (Part of Hampton Roads and the Eastern Shore of Virginia) | VA | July 1, 1996 |
| 758 | Saint Lucia (all) | ST. LUCIA | July 1, 1996 |
| 760 | California (most of the desert and mountain portions of the southeastern two-thirds of California) | CA | March 22, 1997 |
| 762 | Georgia | GA | May 16, 2006 |
| 763 | Minnesota (Brooklyn Park, Plymouth, Maple Grove, Monticello, Elk River, Fridley, Blaine, and the northwest suburban area of Minneapolis) | MN | February 27, 2000 |
| 765 | Indiana (Kokomo, Lafayette, Marion, Muncie, Richmond, West Lafayette, and most of central Indiana excluding Indianapolis and immediate suburbs) | IN | February 1, 1997 |
| 767 | Commonwealth of Dominica (all) | DOMINICA | October 1, 1997 |
| 769 | Mississippi | MS | March 14, 2005 |
| 770 | Georgia (Marietta, Carrollton, Gainesville, Jonesboro, Lawrenceville, Roswell, Stone Mountain, Snellville, Cartersville, and much of north-central Georgia outside of Atlanta's Interstate 285 Perimeter Highway) | GA | August 1, 1995 |
| 771 | Washington, D.C. (all) | DC | November 9, 2021 |
| 772 | Florida (Fort Pierce, Port Saint Lucie, Sebastian, Stuart, Vero Beach, all of Indian River County, and Martin County) | FL | February 11, 2002 |
| 773 | Illinois (City of Chicago, excluding downtown) | IL | October 12, 1996 |
| 774 | Massachusetts (Berkley, Dennis, Douglas, Easton, Edgartown, Oakham, Oxford, Upton, and southeastern Massachusetts) | MA | May 2, 2001 |
| 775 | Nevada (Carson City, Reno, Elko, Ely, Sparks, Winnemucca, Great Basin National Park, Naval Air Station Fallon, and all of Nevada, except for most of Clark County in southernmost Nevada) | NV | December 12, 1998 |
| 778 | British Columbia (all, and the isolated border town of Hyder, Alaska, US) | BC, BRITISH COLUMBIA | November 3, 2001 |
| 779 | Illinois | IL | March 17, 2007 |
| 780 | Alberta (Edmonton, Jasper, Grande Prairie, Peace River, and all of northern Alberta) | AB, ALBERTA | May 18, 1999 |
| 781 | Massachusetts (Canton, Hanson, Lincoln, Nahant, Plympton, Revere, Stoughton, Winchester, and east-central Massachusetts) | MA | September 1, 1997 |
| 782 | Nova Scotia and Prince Edward Island | NOVA SCOTIA - PRINCE EDWARD ISLAND, NS, PE | November 30, 2014 |
| 784 | Saint Vincent and the Grenadines (all) | ST. VINCENT & GRENADINES | June 1, 1998 |
| 785 | Kansas (Topeka, Salina, Colby, Lawrence, Manhattan, and all of northern and central Kansas not including the Kansas City Metropolitan Area) | KS | July 20, 1997 |
| 786 | Florida (Miami-Dade County and the Florida Keys) | FL | March 1, 1998 |
| 787 | Puerto Rico | PR | March 1, 1996 |
| 800 | Toll-free telephone service | TOLL-FREE | 1966 |
| 801 | Utah (Counties of Davis, Morgan, Salt Lake, Utah, and Weber along the Wasatch Front, including the cities of Salt Lake City, Ogden, and Provo) | UT | 1947 |
| 802 | Vermont (all) | VT | 1947 |
| 803 | South Carolina (Columbia, Rock Hill, Sumter, Aiken, and most of central South Carolina) | SC | 1947 |
| 804 | Virginia (the Richmond Metropolitan Area, including Petersburg and the Northern Neck and Middle Peninsula) | VA | June 24, 1973 |
| 805 | California (Ventura, San Luis Obispo, and Santa Barbara Counties) | CA | 1957 |
| 806 | Texas (Lubbock, Amarillo, Canadian, Canyon, Dalhart, and the entire Texas Panhandle) | TX | 1957 |
| 807 | Ontario (Northwestern Ontario: Thunder Bay, Kenora, Dryden, Greenstone) | ON, ONTARIO | 1962 |
| 808 | Hawaii (all of the Hawaiian Islands to Midway Atoll and major Hawaiian cities including Honolulu, Kailua, Mililani, Haleiwa, Hilo, Kahului, Lihue, etc.; plus Wake Island) | HI | 1957 |
| 809 | Dominican Republic | DOMINICAN REPUBLIC | 1958 |
| 810 | Michigan (Port Huron, Flint, Lapeer, and the Michigan "Thumb") | MI | December 1, 1993 |
| 812 | Indiana (Southern Indiana, including Bloomington, Evansville, Terre Haute, Columbus, Jeffersonville, Lawrenceburg, Madison, and New Albany) | IN | 1947 |
| 813 | Florida (all of Hillsborough County, including Tampa and its suburbs, MacDill Air Force Base, and Plant City; and the inland areas of Pasco County and Oldsmar in Pinellas County[14]) | FL | 1953 |
| 814 | Pennsylvania (Erie, State College, Altoona, Clearfield, Emporium, Johnsonburg, Johnstown, Meyersdale, Ridgway, Somerset, and most of northwestern and parts of central Pennsylvania) | PA | 1947 |
| 815 | Illinois (much of northern Illinois outside Chicago and its immediate surrounding suburbs: Rockford and its suburbs, Belvidere, La Salle, Peru, DeKalb, Sycamore, Freeport, Dixon, Sterling, Rock Falls, Ottawa, Morris, Princeton, Mendota, Rochelle, Sandwich, Streator, Pontiac, Kankakee, and some outlying Chicago suburbs such as Harvard, McHenry, Crystal Lake, Woodstock, Plainfield, Joliet, Romeoville, Lockport, New Lenox, Frankfort, Minooka, Channahon, and Shorewood) | IL | 1947 |
| 816 | Missouri (Kansas City, St Joseph, Independence, Harrisonville, and parts of west-central Missouri) | MO | 1947 |
| 817 | Texas (Fort Worth, Arlington, Grand Prairie, Grandview, Weatherford) | TX | 1953 |
| 818 | California (the San Fernando Valley portion of Los Angeles County, including Burbank, Canoga Park, Encino, Glendale, North Hollywood, Northridge, Panorama City, Reseda, San Fernando, Sylmar, Tarzana, Van Nuys, and Woodland Hills) | CA | January 7, 1984 |
| 819 | Quebec (Western Québec, except Montréal 514 and surrounding area 450: a large area including Abitibi-Témiscamingue, Estrie, Mauricie, Outaouais, Sherbrooke, and Trois-Rivieres) | QC, QUEBEC | 1957 |
| 820 | California (Ventura, San Luis Obispo, and Santa Barbara Counties) | CA | June 30, 2018 |
| 821 | South Carolina (The Upstate, including Greenville, Spartanburg, Anderson, Clemson, and most of northwestern South Carolina) | SC | August 19, 2024 |
| 822 | Toll-free telephone service | TOLL-FREE | Unknown |
| 825 | Alberta (all) | AB, ALBERTA | April 9, 2016 |
| 826 | Virginia (Fredericksburg, Roanoke, Blacksburg, Harrisonburg, Lexington, Staunton, Winchester, and parts of north-central Virginia) | VA | June 14, 2022 |
| 828 | North Carolina (Asheville, Franklin, Hickory, Murphy, Waynesville, and parts of western North Carolina) | NC | March 22, 1998 |
| 829 | Dominican Republic | DOMINICAN REPUBLIC | August 1, 2005 |
| 830 | Texas (Del Rio, Kerrville, Eagle Pass, Fredericksburg, New Braunfels, and a part of the Rio Grande Valley) | TX | July 7, 1997 |
| 831 | California (Monterey County, including Salinas and Monterey); San Benito County (including Hollister); and Santa Cruz County (including Santa Cruz and Watsonville) | CA | July 11, 1998 |
| 832 | Texas (Houston Metropolitan Area and suburbs) | TX | January 16, 1999 |
| 833 | Toll-free telephone service | TOLL-FREE | June 3, 2017 |
| 835 | Pennsylvania (Chester, Lehigh Valley, Norristown, Reading; parts of southeastern Pennsylvania) | PA | September 2, 2022 |
| 837 | California (Redding, Auburn, Chico, Davis, the California shore of Lake Tahoe, Placerville, Susanville, Truckee, Yreka, and most of northeastern California) | CA | January 31, 2025 |
| 838 | New York (Albany, Schenectady, Plattsburgh, Saranac Lake, Lake George, Westport, and most of northeastern New York) | NY | September 19, 2017 |
| 839 | South Carolina | SC | May 26, 2020 |
| 840 | California (southwestern San Bernardino County and a small portion of Los Angeles and Riverside counties, including Fontana, Pomona, Chino Hills, Claremont, Chino, Ontario, and Redlands) | CA | February 23, 2021 |
| 843 | South Carolina (Charleston, Florence, Hilton Head Island, Myrtle Beach, Charleston Air Force Base, and most of southeastern South Carolina) | SC | March 22, 1998 |
| 844 | Toll-free telephone service | TOLL-FREE | December 7, 2013 |
| 845 | New York (Dutchess, Orange, Putnam, Rockland, Sullivan, and Ulster counties) | NY | June 5, 2000 |
| 847 | Illinois (North and northwest suburbs of Chicago, including Lake, northern Cook, northern Kane, and extreme southeastern McHenry Counties; includes Evanston, Skokie, Niles, Park Ridge, Des Plaines, Mount Prospect, Arlington Heights, Palatine, Wheeling, Buffalo Grove, Barrington, Elk Grove Village, Schaumburg, Hoffman Estates, Elgin, Carpentersville, Algonquin, Lake in the Hills, Huntley, Hampshire, Cary, Lake Zurich, Fox Lake, Round Lake Beach, Antioch, Gurnee, Waukegan, Zion, Lake Forest, Vernon Hills, Libertyville, Mundelein, Northbrook, Glenview, Deerfield, Highland Park, Wilmette, Winnetka) | IL | January 20, 1996 |
| 848 | New Jersey (New Brunswick, Lakewood, Neptune, Fort Dix, and most of east-central New Jersey) | NJ | December 29, 2001 |
| 849 | Dominican Republic | DOMINICAN REPUBLIC | July 1, 2009 |
| 850 | northwestern Florida (Appalachicola, Pensacola, Tallahassee, Quincy, Panama City, Naval Air Station Pensacola, Eglin Air Force Base and all of the Florida Panhandle) | FL | June 23, 1997 |
| 854 | South Carolina (Charleston, Florence, Hilton Head Island, Myrtle Beach, Charleston Air Force Base, and most of southeastern South Carolina) | SC | October 19, 2015 |
| 855 | Toll-free telephone service | TOLL-FREE | October 9, 2010 |
| 856 | New Jersey (Cherry Hill, Camden, Millville, Vineland, and most of southwestern New Jersey) | NJ | June 12, 1999 |
| 857 | Massachusetts (Belmont, Brookline, Chelsea, Everett, Milton, Quincy, Watertown, Winthrop, and close-in Boston suburbs) | MA | May 2, 2001 |
| 858 | California (San Diego and suburbs) | CA | June 12, 1999 |
| 859 | Kentucky (Lexington, Richmond, Danville, Covington, Florence, and northernmost Kentucky) | KY | April 1, 2000 |
| 860 | Northern and eastern Connecticut (Hartford, Bristol, Norwich, and northern and eastern Connecticut) | CT | August 28, 1995 |
| 861 | Illinois (Peoria, Bloomington, Moline, Rock Island, Galesburg; west-central Illinois) | IL | February 24, 2023 |
| 862 | New Jersey | NJ | December 29, 2001 |
| 863 | Florida (Lakeland, Bartow, Sebring, Winter Haven in south central Florida) | FL | September 20, 1999 |
| 864 | South Carolina (The Upstate, including Greenville, Spartanburg, Anderson, Clemson, and most of northwestern South Carolina) | SC | December 3, 1995 |
| 865 | Tennessee (Knoxville, Alcoa, Athens, Clinton, Crossville, Dayton, Gatlinburg, Loudon, Maryville, Newport, Oak Ridge, Oliver Springs, Pigeon Forge, Rockwood, Sweetwater, etc., in east Tennessee) | TN | November 1, 1999 |
| 866 | Toll-free telephone service | TOLL-FREE | July 29, 2000 |
| 867 | the Canadian Territories: Yukon, Northwest Territories, and Nunavut | NORTHWEST TERRITORIES -YUKON - NUNAVUT, NT, NU, YT | October 21, 1997 |
| 868 | Trinidad and Tobago (all) | TRINIDAD & TOBAGO | June 1, 1997 |
| 869 | Saint Kitts and Nevis (all) | ST. KITTS & NEVIS | October 1, 1996 |
| 870 | Arkansas (Texarkana, Jonesboro, Pine Bluff, and southern, eastern, and northeastern Arkansas) | AR | April 14, 1997 |
| 872 | Illinois (Chicago) | IL | November 7, 2009 |
| 873 | Quebec (Western Québec, except Montréal 514 and surrounding area 450: a large area including Abitibi-Témiscamingue, Estrie, Mauricie, Outaouais, Sherbrooke, and Trois-Rivières) | QC, QUEBEC | September 15, 2012 |
| 876 | Jamaica | JAMAICA | May 1, 1997 |
| 877 | Toll-free telephone service | TOLL-FREE | April 4, 1998 |
| 878 | Pennsylvania (Pittsburgh) and suburbs | PA | August 17, 2001 |
| 879 | Newfoundland (all) and Labrador | NEWFOUNDLAND AND LABRADOR, NL | March 17, 2024[25] |
| 888 | Toll-free telephone service | TOLL-FREE | March 1, 1996 |
| 889 | Reserved toll-free code | TOLL-FREE | Unknown |
| 900 | premium-rate telephone numbers | NANP AREA | 1971 |
| 901 | Tennessee (Memphis, Covington, Germantown, Somerville, and extreme southwestern Tennessee, mostly in Shelby County) | TN | 1947 |
| 902 | Nova Scotia and Prince Edward Island | NOVA SCOTIA - PRINCE EDWARD ISLAND, NS, PE | 1947 |
| 903 | Texas (Tyler, Sherman, Longview, Marshall, Palestine, Jacksonville, Carthage, and Northeast Texas) | TX | November 4, 1990 |
| 904 | Florida (Jacksonville, St. Augustine, Starke, and most of northeastern Florida) | FL | July 11, 1965 |
| 905 | Ontario (Niagara Falls Region (including St. Catharines), Hamilton, and Greater Toronto Area, except for Toronto) | ON, ONTARIO | October 4, 1993 |
| 906 | Michigan (Upper Peninsula: Sault Ste. Marie, Escanaba, Houghton, Iron Mountain, Marquette, Menominee, etc.) | MI | March 19, 1961 |
| 907 | Alaska (all, except the lone border town of Hyder which uses the BC, Canada area codes of 236, 250, 672, or 778 depending on its assigned number) | AK | 1957 |
| 908 | New Jersey (Alpha, Washington, Elizabeth, Warren, Plainfield, and west-central New Jersey) | NJ | November 1, 1990 |
| 909 | California (southwestern San Bernardino County and a small portion of Los Angeles and Riverside Counties, including Fontana, Pomona, Chino Hills, Claremont, Chino, Ontario, and Redlands) | CA | November 14, 1992 |
| 910 | North Carolina (Fayetteville, Wilmington, Fort Liberty, Seymour Johnson Air Force Base, Jacksonville, Lumberton, and much of southeastern North Carolina) | NC | November 14, 1993 |
| 912 | Georgia (Savannah, Statesboro, Vidalia, Waycross, Brunswick, Douglas, and southeastern Georgia) | GA | 1954 |
| 913 | Kansas (Kansas City, Kansas, Overland Park, Olathe, Lenexa, Leavenworth, Bonner Springs, De Soto, parts of eastern Kansas) | KS | 1947 |
| 914 | New York (Westchester County) | NY | 1947 |
| 915 | Texas (all of El Paso County and portions of Hudspeth County) | TX | 1947 |
| 916 | California (the Sacramento Metropolitan Area) | CA | 1947 |
| 917 | New York (New York City: all; mainly cell phones) | NY | 1992 |
| 918 | Oklahoma (Tulsa, Bartlesville, McAlester, Muskogee, Henryetta, and northeastern Oklahoma) | OK | 1953 |
| 919 | North Carolina (the Research Triangle, including Raleigh, the state capital city; Durham, Cary, and Chapel Hill; and Goldsboro and other parts of north-central North Carolina) | NC | 1954 |
| 920 | Wisconsin (Appleton, Sheboygan, Oshkosh, Green Bay, Manitowoc, Marquette, Fond du Lac, and parts of eastern Wisconsin, but not Milwaukee County) | WI | July 26, 1997 |
| 924 | Minnesota (Rochester, Mankato, Austin, Marshall, Winona, and most of southern Minnesota) | MN | August 30, 2024[27] |
| 925 | California (inland regions of the East Bay: Livermore, Concord, Pleasant Hill, Walnut Creek, Martinez, Pleasanton, and Dublin, just east of the hills that ring San Francisco Bay) | CA | March 14, 1998 |
| 928 | Arizona (except for Phoenix metropolitan area, Tucson metropolitan area, and some areas west and south of Tucson) | AZ | June 23, 2001 |
| 929 | New York (New York City: The Bronx, Brooklyn, Queens, Staten Island, and Marble Hill) | NY | April 16, 2011 |
| 930 | Indiana (Southern Indiana, including Bloomington, Evansville, Terre Haute, Columbus, Jeffersonville, Lawrenceburg, Madison, and New Albany) | IN | March 7, 2015 |
| 931 | Tennessee (Southern Middle Tennessee)[12] | TN | September 15, 1997 |
| 934 | New York (Suffolk County on Long Island) | NY | July 16, 2016 |
| 936 | Texas (Nacogdoches, Lufkin, Conroe, Huntsville, Center, and Southeast Texas) | TX | February 19, 2000 |
| 937 | Ohio (Dayton, Springfield, and southwestern Ohio north and east of the Cincinnati metropolitan area) | OH | September 28, 1996 |
| 938 | Alabama (Huntsville, Anniston, Cullman, Decatur, Florence, Fort Payne, Gadsden, Madison, Sheffield, Tuscumbia) | AL | July 10, 2010 |
| 939 | Puerto Rico | PR | September 15, 2001 |
| 940 | Texas (the area immediately north of the Dallas–Fort Worth metroplex: Denton, Wichita Falls, Decatur, Gainesville, Vernon, etc.) | TX | May 25, 1997 |
| 941 | Florida (Gulf Coast immediately south of Tampa Bay: all of Manatee County, Sarasota County, and Charlotte County; includes Bradenton, Port Charlotte, Sarasota, and Punta Gorda) | FL | May 28, 1995 |
| 942 | will overlay 416/647/437 (Toronto metropolitan area) | ON, ONTARIO | April 26, 2025[28] |
| 943 | Georgia (Metro Atlanta) | GA | March 15, 2022 |
| 945 | Texas Dallas–Fort Worth metroplex | TX | January 15, 2021 |
| 947 | Michigan (Oakland County) | MI | September 7, 2002 |
| 948 | Virginia (Part of Hampton Roads and the Eastern Shore of Virginia) | VA | May 9, 2022 |
| 949 | California (Southern Orange County: Irvine, Lake Forest, Mission Viejo, Corona del Mar, San Clemente, Laguna Beach, Dana Point, San Juan Capistrano, Rancho Santa Margarita, and parts of Newport Beach and Costa Mesa) | CA | April 18, 1998 |
| 951 | California (western Riverside County, including Riverside, Corona, California, Lake Elsinore, Mira Loma, Moreno Valley, Sun City, Temecula, Winchester, Lakeview, etc.) | CA | July 17, 2004 |
| 952 | Minnesota (Bloomington, Eden Prairie, Edina, Minnetonka, Chaska, and the southwest suburban Minneapolis area) | MN | February 27, 2000 |
| 954 | Florida (all of Broward County: Fort Lauderdale, Hollywood, Coral Springs, etc.) | FL | September 11, 1995 |
| 956 | Texas (Laredo, Harlingen, Brownsville, McAllen, and southmost Texas) | TX | July 7, 1997 |
| 959 | Northern and eastern Connecticut (Hartford, Bristol, Norwich, and northern and eastern Connecticut) | CT | August 30, 2014 |
| 970 | Colorado (Grand Junction, Aspen, Durango, Estes Park, Fort Collins, Frisco, Glenwood Springs, Greeley, Purgatory, Steamboat Springs, Telluride, Vail, Rocky Mountain National Park, Dinosaur National Monument, and most of north-central, south-central, and western Colorado) | CO | April 2, 1995 |
| 971 | Oregon (Portland, Salem, Hillsboro, Beaverton, and most of northwestern Oregon) | OR | October 1, 2000 |
| 972 | Texas (Dallas metropolitan area) | TX | September 14, 1996 |
| 973 | New Jersey (Newark, Paterson, and most of northeastern New Jersey) | NJ | June 1, 1997 |
| 975 | Missouri (Kansas City, St Joseph, Independence, Harrisonville, and parts of west-central Missouri) | MO | October 13, 2023 |
| 978 | Massachusetts (Ashby, Barre, Boxborough, Carlisle, Groveland, Rowley, Wendell, Wenham, and northeastern Massachusetts) | MA | September 1, 1997 |
| 979 | Texas (Wharton, Bryan, Bay City, College Station, Lake Jackson, La Grange, and southeastern Texas) | TX | February 19, 2000 |
| 980 | North Carolina | NC | April 1, 2001 |
| 983 | Denver, Colorado | CO | June 17, 2022 |
| 984 | North Carolina | NC | April 30, 2012 |
| 985 | Louisiana (Houma, Slidell, and southeastern Louisiana excluding New Orleans) | LA | February 12, 2001 |
| 986 | Idaho | ID | September 5, 2017 |
| 989 | Michigan (Alpena, Mt. Pleasant, Bay City, Saginaw, Midland, Owosso, and a part of central Michigan) | MI | April 7, 2001 |