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312-204

You are reviewing the Area Code (NPA/NXX) report for 312-204. Did you mean to search the SMS short code 312204?

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🇺🇸 DSN NORTHCOM Area Code Detected

The area code you entered, 312, overlaps with the DSN network for the Continental United States and Puerto Rico under Northern Command (NORTHCOM), though it could also be part of standard civilian phone numbers.

Raw Number312204
Basic Format312-204
NPA (Area Code)312
NXX204

Call Routing Data

NPA-NXX-XOCNCompanyRate CenterUse TypeAssign DateCityStateRegionBlock Effective Date
312-204-0XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-204-1XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-204-2XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-204-3XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-204-4XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-204-5XXX9329ILLINOIS BELL TEL COCHICGOZN01RTCHICAGO ZONE 01ILMW
312-204-6XXX7229MCIMETRO ACCESS TRANSMISSION SERVICES LLCCHICGOZN01AS10/02/2008CHICAGO ZONE 01ILMW10/31/2008
312-204-7XXX7229MCIMETRO ACCESS TRANSMISSION SERVICES LLCCHICGOZN01AS10/02/2008CHICAGO ZONE 01ILMW10/31/2008
312-204-8XXX7229MCIMETRO ACCESS TRANSMISSION SERVICES LLCCHICGOZN01AS10/02/2008CHICAGO ZONE 01ILMW10/31/2008
312-204-9XXX6333CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ILCHICGOZN01AS07/20/2010CHICAGO ZONE 01ILMW09/02/2010
312-204-XXXX9329ILLINOIS BELL TEL COCHICGOZN01ASCHICAGO ZONE 01IL

Business/Government Phones on the 312-204 Prefix

PhoneNameAddress
312-204-6981True Food Kitchen1 West Erie Street Chicago 60654 US

Reports

Anonymous User from Chicago, Illinois

April 24, 2026 at 12:34 PM

312-204-0863 reported as a Robocall. Received on April 24, 2026 at 9:18 AM.

Anonymous User from Chicago, Illinois

April 24, 2026 at 12:31 PM

312-204-3965 reported as a Robocall. Received on April 24, 2026 at 10:30 AM.

Anonymous User from , IL

April 17, 2026 at 9:59 AM

312-204-0266 reported as a Robocall. Received on April 17, 2026 at 8:58 AM.
Call for No Subject Provided

Anonymous User from Cicero, Illinois

February 6, 2026 at 3:10 PM

312-204-3859 reported as a Robocall. Received on February 6, 2026 at 1:25 PM.

Anonymous User from Glenview, Illinois

January 22, 2026 at 4:37 PM

312-204-6594 reported as a Robocall. Received on January 22, 2026 at 9:59 AM.
Call for Calls pretending to be government, businesses, or family and friends

Anonymous User from , MD

December 9, 2025 at 3:40 PM

312-204-6190 reported as a Robocall. Received on December 9, 2025 at 3:39 PM.
Call for Computer & technical support

Anonymous User from , IL

October 1, 2025 at 4:33 PM

312-204-3725 reported as a Robocall. Received on October 1, 2025 at 12:00 PM.
Call for Calls pretending to be government, businesses, or family and friends

Anonymous User from , IL

September 30, 2025 at 5:28 PM

312-204-1675 reported as a Robocall. Received on September 30, 2025 at 2:50 AM.

Anonymous User from , IL

September 30, 2025 at 5:27 PM

312-204-1958 reported as a Robocall. Received on September 30, 2025 at 4:18 AM.

Anonymous User from , IL

September 29, 2025 at 2:54 PM

312-204-2445 reported as a Robocall. Received on September 26, 2025 at 2:05 PM.

Anonymous User from , IL

September 29, 2025 at 2:53 PM

312-204-8617 reported as a Robocall. Received on September 26, 2025 at 1:14 PM.

Anonymous User from , IL

September 29, 2025 at 2:34 PM

312-204-2205 reported as a Robocall. Received on September 29, 2025 at 1:08 PM.

Anonymous User from Inverness, Illinois

September 29, 2025 at 11:40 AM

312-204-8225 reported as a Robocall. Received on September 29, 2025 at 9:05 AM.

Anonymous User from Elmhurst, Illinois

September 4, 2025 at 4:53 PM

312-204-5504 reported as a Robocall. Received on September 4, 2025 at 1:00 PM.
Call for Reducing your debt (credit cards, mortgage, student loans)

Anonymous User from Willingboro, New Jersey

May 20, 2025 at 11:44 AM

312-204-5809 reported as a Live Voice or Other. Received on May 20, 2025 at 11:20 AM.

Anonymous User from Monticello, Georgia

April 25, 2025 at 10:25 AM

312-204-8362 reported as a unwanted call. Received on April 25, 2025 at 10:08 AM.

Anonymous User from Chicago, Illinois

March 4, 2025 at 5:38 PM

312-204-9256 reported as a Robocall. Received on March 4, 2025 at 4:28 PM.
Call for Calls pretending to be government, businesses, or family and friends

Anonymous User from Chicago, Illinois

December 31, 2024 at 9:31 AM

312-204-1638 reported as a Live Voice or Other. Received on December 31, 2024 at 8:17 AM.
Call for Calls pretending to be government, businesses, or family and friends

Anonymous User from Chicago Il, Illinois

October 26, 2024 at 12:02 PM

312-204-2358 reported as a Live Voice or Other. Received on October 19, 2024 at 9:15 AM.
Call for Dropped call or no message

Anonymous User from Chicago, IL

June 14, 2024 at 9:48 PM

reported as a Live Voice. Received on June 14, 2024 at 4:35 PM.
Unwanted call for unknown
Caller ID indicated they called from 312-204-5971
Contacted via Internet (VOIP)

Anonymous User from Chicago, Illinois

April 23, 2024 at 1:03 PM

312-204-1659 reported as a unwanted call. Received on April 23, 2024 at 10:35 AM.
Call for Dropped call or no message

Anonymous User from Hinsdale, Illinois

March 30, 2024 at 11:29 AM

312-204-8434 reported as a Robocall. Received on March 29, 2024 at 2:42 PM.
Call for Dropped call or no message

Anonymous User from Chicago, Illinois

March 27, 2024 at 12:55 PM

312-204-1736 reported as a unwanted call. Received on March 27, 2024 at 10:00 AM.
Call for Dropped call or no message

Anonymous User from , IL

February 12, 2024 at 11:40 AM

312-204-9337 reported as a Robocall. Received on February 12, 2024 at 10:39 AM.

Anonymous User from Evergreen Park, IL

September 7, 2023 at 3:53 PM

312-204-9268 reported as a Prerecorded Voice. Received on September 7, 2023 at 9:31 AM.
Unwanted call for unknown
Contacted via Wireless (cell phone/other mobile device)

Anonymous User from Chicago, Illinois

July 25, 2023 at 7:13 PM

312-204-9903 reported as a Robocall. Received on July 25, 2023 at 4:47 PM.

Anonymous User from , NJ

April 29, 2023 at 12:58 PM

312-204-9771 reported as a Live Voice or Other. Received on April 29, 2023 at 12:57 PM.
Call for Calls pretending to be government, businesses, or family and friends

Anonymous User from Chicago, Illinois

March 24, 2023 at 1:05 PM

312-204-7184 reported as a Robocall. Received on March 10, 2023 at 12:10 PM.
Call for Dropped call or no message

Anonymous User from , IL

December 14, 2022 at 10:09 AM

312-204-7595 reported as a Robocall. Received on November 17, 2022 at 11:16 AM.

Anonymous User from , IL

August 5, 2022 at 12:36 PM

312-204-5819 reported as a Robocall. Received on August 5, 2022 at 11:28 AM.
Call for Warranties & protection plans

Anonymous User from , VA

January 26, 2015 at 7:44 PM

reported as a Live Voice. Received on January 23, 2015 at 1:30 PM.
Telemarketing (including do not call and spoofing) for unknown
Caller ID indicated they called from 312-204-8131
Contacted via Wireless (cell phone/other mobile device)

Most 'popular' numbers on this prefix:

312-204-1XXX: 312-204-1600 | 312-204-1605 | 312-204-1608 | 312-204-1653 | 312-204-1656 | 312-204-1659 | 312-204-1700 | 312-204-1701 | 312-204-1705 | 312-204-1730 | 312-204-1736 | 312-204-1738 |
312-204-2XXX: 312-204-2300 | 312-204-2345 | 312-204-2352 | 312-204-2353 | 312-204-2354 | 312-204-2362 |
312-204-5XXX: 312-204-5801 | 312-204-5803 | 312-204-5804 | 312-204-5810 | 312-204-5811 | 312-204-5819 | 312-204-5971 | 312-204-5972 | 312-204-5979 | 312-204-5997 |
312-204-6XXX: 312-204-6901 | 312-204-6906 | 312-204-6909 | 312-204-6984 | 312-204-6985 | 312-204-6989 |
312-204-7XXX: 312-204-7103 | 312-204-7104 | 312-204-7155 | 312-204-7181 | 312-204-7185 | 312-204-7186 | 312-204-7500 | 312-204-7503 | 312-204-7505 | 312-204-7590 | 312-204-7592 | 312-204-7596 |
312-204-8XXX: 312-204-8130 | 312-204-8133 | 312-204-8138 | 312-204-8144 | 312-204-8146 | 312-204-8166 | 312-204-8336 | 312-204-8360 | 312-204-8365 | 312-204-8383 | 312-204-8387 | 312-204-8432 | 312-204-8437 | 312-204-8438 | 312-204-8483 | 312-204-8486 | 312-204-8487 | 312-204-8800 | 312-204-8890 | 312-204-8891 | 312-204-8899 |
312-204-9XXX: 312-204-9260 | 312-204-9263 | 312-204-9264 | 312-204-9265 | 312-204-9266 | 312-204-9301 | 312-204-9336 | 312-204-9337 | 312-204-9339 | 312-204-9393 | 312-204-9396 | 312-204-9500 | 312-204-9533 | 312-204-9535 | 312-204-9538 | 312-204-9550 | 312-204-9771 | 312-204-9772 | 312-204-9779 | 312-204-9792 | 312-204-9793 | 312-204-9794 | 312-204-9900 | 312-204-9901 | 312-204-9903 | 312-204-9909 | 312-204-9999 |