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303-999

You are reviewing the Area Code (NPA/NXX) report for 303-999. Did you mean to search the SMS short code 303999?

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Phone LookupTop ComplaintsArea CodesNPA-NXXiMessage
Examples: 206-739-5800, 206, 206-739, 48369
Raw Number303999
Basic Format303-999
NPA (Area Code)303
NXX999

Call Routing Data

NPA-NXX-XOCNCompanyRate CenterUse TypeAssign DateCityStateRegionBlock Effective Date
303-999-0XXX318JCOMCAST IP PHONE, LLCDENVERAS08/29/2007DENVERCOWE10/30/2007
303-999-1XXX6010NEW CINGULAR WIRELESS PCS, LLCDENVERAS05/02/2008DENVERCOWE06/01/2008
303-999-2XXX3467ELECTRIC LIGHTWAVE LLC DBA ALLSTREAMDENVERAS01/23/2008DENVERCOWE02/04/2008
303-999-3XXX3467ELECTRIC LIGHTWAVE LLC DBA ALLSTREAMDENVERAS04/03/2008DENVERCOWE05/03/2008
303-999-4XXX4574LEVEL 3 TELECOM OF COLORADO, LLC - CODENVERAS04/25/2008DENVERCOWE05/07/2008
303-999-5XXX6010NEW CINGULAR WIRELESS PCS, LLCDENVERAS05/02/2008DENVERCOWE06/01/2008
303-999-6XXX6010NEW CINGULAR WIRELESS PCS, LLCDENVERAS05/02/2008DENVERCOWE06/01/2008
303-999-7XXX6010NEW CINGULAR WIRELESS PCS, LLCDENVERAS05/02/2008DENVERCOWE06/01/2008
303-999-8XXX6529T-MOBILE USA, INC.DENVERAS05/22/2008DENVERCOWE06/21/2008
303-999-9XXX6529T-MOBILE USA, INC.DENVERAS05/22/2008DENVERCOWE06/21/2008
303-999-XXXX318JCOMCAST IP PHONE, LLCDENVERAS08/24/2007DENVERCO

Business/Government Phones on the 303-999 Prefix

PhoneNameAddress
303-999-0596Hubbell Home Roofing
303-999-9334Gabriel's Garage Doors LLC
303-999-9979Carrasco's Roofing
303-999-9999Boesen Law LLC
303-999-0077Novo Coffee1600 Glenarm Place Denver 80202 US
303-999-0405MOVE Studios40 South Broadway Denver 80209 US
303-999-0718Sterre2501 Dallas Street Aurora 80010 US
303-999-1363Brothers Home Inspection Denver44 Cook Street Denver 80206 US
303-999-1481Local Home Inspections, LLC25587 Conifer Road Conifer 80433 US
303-999-3820Eco-Cycle CHaRM: Center for Hard-to-Recycle Materials6400 Arapahoe Road Boulder 80303 US
303-999-9016Engraving ColoradoUS

Reports

Anonymous User from Longmont, Colorado

April 10, 2026 at 5:40 PM

303-999-3358 reported as a Robocall. Received on April 10, 2026 at 3:07 PM.
Call for Medical & prescriptions

Anonymous User from Estero, Florida

March 11, 2026 at 12:29 PM

303-999-4400 reported as a Robocall. Received on March 11, 2026 at 12:23 PM.
Call for Medical & prescriptions

Anonymous User from Longmont, Colorado

February 26, 2026 at 5:09 PM

303-999-3110 reported as a Live Voice or Other. Received on February 26, 2026 at 2:58 PM.
Call for Medical & prescriptions

Anonymous User from Longmont, Colorado

January 13, 2026 at 3:04 PM

303-999-9913 reported as a Robocall. Received on January 13, 2026 at 1:00 PM.

Anonymous User from Henderson, Colorado

November 18, 2025 at 1:06 PM

303-999-1256 reported as a Robocall. Received on October 30, 2025 at 10:43 AM.
Call for Calls pretending to be government, businesses, or family and friends

Anonymous User from Castle Rock, Colorado

September 16, 2025 at 2:12 PM

303-999-3802 reported as a Robocall. Received on September 16, 2025 at 12:10 PM.
Call for Reducing your debt (credit cards, mortgage, student loans)

Anonymous User from Littleton, Colorado

April 16, 2025 at 3:36 PM

303-999-3860 reported as a Live Voice or Other. Received on April 16, 2025 at 1:00 AM.

Anonymous User from , CO

March 27, 2025 at 11:08 AM

303-999-0496 reported as a Robocall. Received on March 27, 2025 at 9:06 AM.
Call for Energy, solar, & utilities

Anonymous User from Aurora, Colorado

February 25, 2025 at 11:27 AM

303-999-2162 reported as a Robocall. Received on February 25, 2025 at 9:26 AM.

Anonymous User from Longmont, Colorado

January 30, 2025 at 4:01 PM

303-999-4138 reported as a Live Voice or Other. Received on January 30, 2025 at 1:57 PM.
Call for Home improvement & cleaning

Anonymous User from Denver, Colorado, Colorado

December 1, 2024 at 10:16 PM

303-999-2109 reported as a Robocall. Received on November 25, 2024 at 8:24 AM.

Anonymous User from Denver, Colorado

August 13, 2024 at 1:23 PM

303-999-0862 reported as a Robocall. Received on August 13, 2024 at 11:02 AM.
Call for Dropped call or no message

Anonymous User from , IL

March 26, 2024 at 2:02 PM

303-999-6861 reported as a Live Voice or Other. Received on March 26, 2024 at 12:53 PM.

Anonymous User from Aurora, Colorado

March 15, 2024 at 2:22 PM

303-999-3779 reported as a Robocall. Received on March 15, 2024 at 11:09 AM.
Call for Dropped call or no message

Anonymous User from , CO

March 8, 2024 at 1:40 PM

303-999-3481 reported as a Robocall. Received on March 8, 2024 at 10:51 AM.

Anonymous User from Evergreen, Colorado

March 6, 2024 at 6:18 PM

303-999-4914 reported as a Live Voice or Other. Received on February 27, 2024 at 4:04 PM.
Call for Dropped call or no message

Anonymous User from , CO

December 28, 2023 at 4:57 PM

303-999-6982 reported as a Live Voice or Other. Received on December 27, 2023 at 2:52 PM.
Call for No Subject Provided

Anonymous User from , CO

December 28, 2023 at 4:55 PM

303-999-6175 reported as a Live Voice or Other. Received on December 27, 2023 at 3:56 PM.
Call for No Subject Provided

Anonymous User from , CO

December 28, 2023 at 4:46 PM

303-999-7329 reported as a Robocall. Received on December 27, 2023 at 7:28 AM.
Call for No Subject Provided

Anonymous User from , CO

December 28, 2023 at 4:43 PM

303-999-6325 reported as a Live Voice or Other. Received on December 27, 2023 at 1:37 PM.
Call for No Subject Provided

Anonymous User from , CO

December 28, 2023 at 4:39 PM

303-999-6060 reported as a Live Voice or Other. Received on December 27, 2023 at 2:01 PM.
Call for No Subject Provided

Anonymous User from , CO

December 28, 2023 at 4:30 PM

303-999-7109 reported as a Live Voice or Other. Received on December 28, 2023 at 12:00 AM.
Call for No Subject Provided

Anonymous User from Littleton, Colorado

November 8, 2023 at 3:26 PM

303-999-6390 reported as a Live Voice or Other. Received on November 8, 2023 at 1:25 AM.
Call for Home improvement & cleaning

Anonymous User from Broomfield, Colorado

October 6, 2023 at 1:37 PM

303-999-4759 reported as a Robocall. Received on October 5, 2023 at 10:05 AM.
Call for Reducing your debt (credit cards, mortgage, student loans)

Anonymous User from Aurora, Colorado

July 13, 2023 at 1:58 PM

303-999-7664 reported as a Robocall. Received on July 13, 2023 at 11:57 AM.
Call for Calls pretending to be government, businesses, or family and friends

Anonymous User from , CO

June 29, 2023 at 3:02 PM

303-999-3979 reported as a Robocall. Received on June 29, 2023 at 10:22 AM.
Call for Medical & prescriptions

Anonymous User from , NJ

June 24, 2023 at 12:01 PM

303-999-0731 reported as a Robocall. Received on June 24, 2023 at 11:58 AM.
Call for Dropped call or no message

Anonymous User from Parker, Colorado

September 23, 2022 at 5:26 PM

303-999-4904 reported as a Robocall. Received on September 23, 2022 at 3:22 PM.

Anonymous User from , IN

September 6, 2022 at 4:44 PM

303-999-3550 reported as a unwanted call. Received on September 6, 2022 at 10:12 AM.
Call for No Subject Provided

Anonymous User from Littleton, Colorado

August 19, 2022 at 12:50 PM

303-999-9552 reported as a Live Voice or Other. Received on August 19, 2022 at 10:21 AM.

Anonymous User from Parker, Colorado

June 21, 2022 at 4:46 PM

303-999-6986 reported as a Robocall. Received on June 21, 2022 at 1:29 PM.
Call for Warranties & protection plans

Anonymous User from , WV

January 20, 2015 at 6:28 PM

reported as a Prerecorded Voice. Received on January 20, 2015 at 2:01 AM.
Robocall for unknown
Caller ID indicated they called from 303-999-4669
Contacted via Wireless (cell phone/other mobile device)

Most 'popular' numbers on this prefix:

303-999-0XXX: 303-999-0000 | 303-999-0005 | 303-999-0070 | 303-999-0072 | 303-999-0077 | 303-999-0400 | 303-999-0403 | 303-999-0405 | 303-999-0411 | 303-999-0416 | 303-999-0417 | 303-999-0419 | 303-999-0420 | 303-999-0422 | 303-999-0426 | 303-999-0428 | 303-999-0500 | 303-999-0526 | 303-999-0576 | 303-999-0593 | 303-999-0596 | 303-999-0597 | 303-999-0702 | 303-999-0707 | 303-999-0731 | 303-999-0733 | 303-999-0737 | 303-999-0787 | 303-999-0802 | 303-999-0806 | 303-999-0808 | 303-999-0860 | 303-999-0862 | 303-999-0867 |
303-999-1XXX: 303-999-1300 | 303-999-1331 | 303-999-1333 | 303-999-1360 | 303-999-1362 | 303-999-1369 |
303-999-2XXX: 303-999-2000 | 303-999-2002 | 303-999-2003 | 303-999-2093 | 303-999-2094 | 303-999-2099 | 303-999-2150 | 303-999-2151 | 303-999-2155 | 303-999-2169 | 303-999-2188 | 303-999-2198 | 303-999-2300 | 303-999-2340 | 303-999-2345 | 303-999-2347 | 303-999-2362 |
303-999-3XXX: 303-999-3000 | 303-999-3003 | 303-999-3009 | 303-999-3030 | 303-999-3062 | 303-999-3400 | 303-999-3405 | 303-999-3443 | 303-999-3481 | 303-999-3488 | 303-999-3489 | 303-999-3500 | 303-999-3535 | 303-999-3550 | 303-999-3558 | 303-999-3559 | 303-999-3700 | 303-999-3755 | 303-999-3771 | 303-999-3772 | 303-999-3773 | 303-999-3800 | 303-999-3860 | 303-999-3862 | 303-999-3869 | 303-999-3937 | 303-999-3939 | 303-999-3972 | 303-999-3977 | 303-999-3979 | 303-999-3987 |
303-999-4XXX: 303-999-4130 | 303-999-4135 | 303-999-4139 | 303-999-4149 | 303-999-4189 | 303-999-4198 | 303-999-4600 | 303-999-4660 | 303-999-4666 | 303-999-4668 | 303-999-4750 | 303-999-4755 | 303-999-4757 | 303-999-4910 | 303-999-4911 | 303-999-4919 | 303-999-4993 | 303-999-4997 | 303-999-4998 |
303-999-5XXX: 303-999-5000 | 303-999-5050 | 303-999-5054 | 303-999-5080 | 303-999-5083 | 303-999-5088 | 303-999-5350 | 303-999-5355 | 303-999-5357 |
303-999-6XXX: 303-999-6000 | 303-999-6006 | 303-999-6030 | 303-999-6031 | 303-999-6038 | 303-999-6060 | 303-999-6062 | 303-999-6065 | 303-999-6118 | 303-999-6161 | 303-999-6167 | 303-999-6171 | 303-999-6177 | 303-999-6178 | 303-999-6391 | 303-999-6396 | 303-999-6397 | 303-999-6398 | 303-999-6410 | 303-999-6411 | 303-999-6415 | 303-999-6443 | 303-999-6446 | 303-999-6449 | 303-999-6600 | 303-999-6622 | 303-999-6626 | 303-999-6627 | 303-999-6655 | 303-999-6656 | 303-999-6800 | 303-999-6862 | 303-999-6865 | 303-999-6868 | 303-999-6881 | 303-999-6883 | 303-999-6980 | 303-999-6988 | 303-999-6989 | 303-999-6992 | 303-999-6996 | 303-999-6997 |
303-999-7XXX: 303-999-7100 | 303-999-7108 | 303-999-7109 | 303-999-7116 | 303-999-7117 | 303-999-7118 | 303-999-7307 | 303-999-7308 | 303-999-7326 | 303-999-7327 | 303-999-7329 | 303-999-7355 | 303-999-7443 | 303-999-7444 | 303-999-7449 | 303-999-7600 | 303-999-7601 | 303-999-7607 | 303-999-7655 | 303-999-7661 | 303-999-7663 | 303-999-7666 | 303-999-7676 |
303-999-8XXX: 303-999-8000 | 303-999-8009 | 303-999-8040 | 303-999-8045 | 303-999-8047 | 303-999-8080 | 303-999-8550 | 303-999-8556 | 303-999-8559 | 303-999-8660 | 303-999-8663 | 303-999-8665 | 303-999-8693 | 303-999-8696 | 303-999-8697 | 303-999-8700 | 303-999-8701 | 303-999-8707 | 303-999-8783 | 303-999-8787 |
303-999-9XXX: 303-999-9000 | 303-999-9005 | 303-999-9006 | 303-999-9080 | 303-999-9088 | 303-999-9089 | 303-999-9300 | 303-999-9301 | 303-999-9303 | 303-999-9305 | 303-999-9331 | 303-999-9333 | 303-999-9337 | 303-999-9339 | 303-999-9360 | 303-999-9365 | 303-999-9367 | 303-999-9500 | 303-999-9503 | 303-999-9505 | 303-999-9551 | 303-999-9555 | 303-999-9559 | 303-999-9706 | 303-999-9707 | 303-999-9709 | 303-999-9770 | 303-999-9773 | 303-999-9777 | 303-999-9900 | 303-999-9975 | 303-999-9976 | 303-999-9977 | 303-999-9999 |