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303-503

You are reviewing the Area Code (NPA/NXX) report for 303-503. Did you mean to search the SMS short code 303503?

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Examples: 206-739-5800, 206, 206-739, 48369
Raw Number303503
Basic Format303-503
NPA (Area Code)303
NXX503

Call Routing Data

NPA-NXX-XOCNCompanyRate CenterUse TypeCityState
303-503-XXXX6567CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CODENVERASDENVERCO

Business/Government Phones on the 303-503 Prefix

PhoneNameAddress
303-503-2362Remco Electric LLC
303-503-2576A1 Contracting Inc
303-503-3739Pioneer Construction Management LLC
303-503-8793Orson Hill Realty
303-503-8840Western Sky Builders
303-503-1902Tinker Art Studio693B South Broadway 80305 US

Reports

Anonymous User from Augusta, Michigan

February 26, 2026 at 10:19 AM

303-503-8019 reported as a Robocall. Received on February 26, 2026 at 10:04 AM.

Anonymous User from , CO

November 14, 2025 at 9:34 AM

303-503-7611 reported as a Live Voice or Other. Received on November 13, 2025 at 3:15 PM.

Anonymous User from Evergreen, Colorado

July 25, 2025 at 2:58 PM

303-503-9799 reported as a Robocall. Received on July 25, 2025 at 12:54 PM.

Anonymous User from Pleasant Hilll, California

May 15, 2024 at 9:32 PM

303-503-9155 reported as a Robocall. Received on May 15, 2024 at 11:39 AM.

Anonymous User from Co, Colorado

October 14, 2023 at 1:41 PM

303-503-7814 reported as a Live Voice or Other. Received on October 14, 2023 at 11:37 AM.
Call for No Subject Provided

Anonymous User from Thornton, Colorado

July 13, 2023 at 5:49 PM

303-503-9611 reported as a Robocall. Received on July 13, 2023 at 3:46 PM.
Call for Warranties & protection plans

Anonymous User from Milford, Connecticut

June 15, 2023 at 4:53 PM

303-503-1907 reported as a Robocall. Received on June 15, 2023 at 3:55 PM.

Anonymous User from Puyallup, Washington

May 25, 2023 at 1:34 PM

303-503-7220 reported as a Live Voice or Other. Received on May 23, 2023 at 12:00 PM.
Call for Calls pretending to be government, businesses, or family and friends

Anonymous User from Denver, Colorado

May 24, 2023 at 12:06 PM

303-503-4558 reported as a Robocall. Received on May 24, 2023 at 9:59 AM.
Call for Medical & prescriptions

Anonymous User from Santa Clarita, California

May 1, 2023 at 5:09 PM

303-503-3895 reported as a Robocall. Received on May 1, 2023 at 12:10 PM.
Call for Computer & technical support

Anonymous User from , CO

April 29, 2023 at 1:37 PM

303-503-1874 reported as a Robocall. Received on April 29, 2023 at 12:00 AM.
Call for No Subject Provided

Anonymous User from , CO

April 27, 2023 at 9:38 AM

303-503-1874 reported as a Robocall. Received on April 27, 2023 at 12:00 AM.
Call for No Subject Provided

Anonymous User from , CO

April 26, 2023 at 7:53 PM

303-503-1874 reported as a Robocall. Received on April 26, 2023 at 12:00 AM.
Call for No Subject Provided

Anonymous User from , CO

April 20, 2023 at 10:50 AM

303-503-1874 reported as a Robocall. Received on April 20, 2023 at 12:00 AM.
Call for No Subject Provided

Anonymous User from , CO

April 19, 2023 at 8:29 AM

303-503-1874 reported as a Robocall. Received on April 19, 2023 at 12:00 AM.
Call for No Subject Provided

Anonymous User from , CO

April 18, 2023 at 12:21 PM

303-503-1874 reported as a Robocall. Received on April 18, 2023 at 12:00 AM.
Call for No Subject Provided

Anonymous User from , CO

April 15, 2023 at 12:58 PM

303-503-1874 reported as a Robocall. Received on April 21, 2022 at 12:00 AM.
Call for No Subject Provided

Anonymous User from Broomfield, CO

December 9, 2022 at 6:22 AM

None reported as a Live Voice. Received on December 9, 2022 at 2:34 PM.
Unwanted call for unknown
Caller ID indicated they called from 303-503-4978
Contacted via Wireless (cell phone/other mobile device)

Anonymous User from Bennett, CO

May 6, 2022 at 11:34 PM

None reported as a Prerecorded Voice. Received on May 6, 2022 at 3:01 PM.
Unwanted call for Amazon Services
Caller ID indicated they called from 303-503-7072
Contacted via Wireless (cell phone/other mobile device)

Anonymous User from , CO

June 2, 2017 at 12:00 AM

None reported as a Prerecorded Voice. Received on May 2, 2017 at 12:00 AM.
Unwanted call for unknown
Caller ID indicated they called from 303-503-9751
Contacted via Wireless (cell phone/other mobile device)

Anonymous User from , CO

December 21, 2016 at 5:34 PM

None reported as a Text Message. Received on December 21, 2016 at 12:00 AM.
Unwanted call for unknown
Caller ID indicated they called from 303-503-7441
Contacted via Wireless (cell phone/other mobile device)

Anonymous User from , CO

October 25, 2016 at 4:18 AM

reported as a Live Voice. Received on October 24, 2016 at 12:00 AM.
Unwanted call for unknown
Caller ID indicated they called from 303-503-8331
Contacted via Wireless (cell phone/other mobile device)

Anonymous User from , CO

February 9, 2016 at 10:53 PM

303-503-8394 reported as a Prerecorded Voice. Received on February 9, 2016 at 2:47 PM.
Robocall for unknown
Contacted via Wireless (cell phone/other mobile device)

Most 'popular' numbers on this prefix:

303-503-0XXX: 303-503-0502 | 303-503-0503 | 303-503-0506 | 303-503-0540 | 303-503-0544 | 303-503-0545 |
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303-503-3XXX: 303-503-3150 | 303-503-3152 | 303-503-3153 | 303-503-3196 | 303-503-3733 | 303-503-3735 | 303-503-3737 | 303-503-3776 | 303-503-3777 | 303-503-3778 | 303-503-3800 | 303-503-3890 | 303-503-3891 | 303-503-3899 |
303-503-4XXX: 303-503-4343 | 303-503-4365 | 303-503-4366 | 303-503-4369 | 303-503-4500 | 303-503-4545 | 303-503-4550 | 303-503-4551 | 303-503-4559 | 303-503-4971 | 303-503-4976 | 303-503-4977 | 303-503-4992 | 303-503-4997 | 303-503-4998 |
303-503-5XXX: 303-503-5927 | 303-503-5976 | 303-503-5977 | 303-503-5980 | 303-503-5981 | 303-503-5988 |
303-503-6XXX: 303-503-6200 | 303-503-6202 | 303-503-6205 | 303-503-6247 |
303-503-7XXX: 303-503-7000 | 303-503-7040 | 303-503-7070 | 303-503-7071 | 303-503-7077 | 303-503-7220 | 303-503-7223 | 303-503-7229 | 303-503-7258 | 303-503-7272 | 303-503-7278 | 303-503-7440 | 303-503-7443 | 303-503-7444 | 303-503-7700 | 303-503-7720 | 303-503-7721 | 303-503-7722 | 303-503-7777 | 303-503-7778 | 303-503-7810 | 303-503-7811 | 303-503-7815 | 303-503-7883 | 303-503-7887 | 303-503-7889 |
303-503-8XXX: 303-503-8303 | 303-503-8336 | 303-503-8383 | 303-503-8393 | 303-503-8396 | 303-503-8399 | 303-503-8471 | 303-503-8472 | 303-503-8473 | 303-503-8490 | 303-503-8493 | 303-503-8497 | 303-503-8701 | 303-503-8783 | 303-503-8787 | 303-503-8795 | 303-503-8797 | 303-503-8799 | 303-503-8800 | 303-503-8801 | 303-503-8840 | 303-503-8847 | 303-503-8848 | 303-503-8899 |
303-503-9XXX: 303-503-9000 | 303-503-9001 | 303-503-9002 | 303-503-9003 | 303-503-9008 | 303-503-9150 | 303-503-9151 | 303-503-9158 | 303-503-9166 | 303-503-9168 | 303-503-9198 | 303-503-9420 | 303-503-9423 | 303-503-9425 | 303-503-9453 | 303-503-9500 | 303-503-9550 | 303-503-9560 | 303-503-9565 | 303-503-9569 | 303-503-9610 | 303-503-9611 | 303-503-9612 | 303-503-9706 | 303-503-9707 | 303-503-9709 | 303-503-9785 | 303-503-9787 | 303-503-9788 |