The 303 Area Code (or Area Code 303) is located in the state of CO. Area Code 303 is one of the 269 3-digit telephone area codes in the USA. It covers roughly 3.1 million unique phone numbers and 10.9 million individuals near the city of Denver
Area code 303 was put into service. In 1988 Area code 303 was split to form area code 719. In 1995 area code 303 was split to form area code 970. In 1998 area code 303 was overlaid with area code 720.
Allenspark, Aurora, Bennett, Brighton, Byers, Deer Trail, Denver, Englewood, Fort Lupton, Golden, Hudson, Idaho Springs, Keenesburg, Littleton, Longmont, Louisville, Lyons, Roggen, Sedalia, Strasburg.
| PREFIX | COUNTY | CITY | CARRIER | TYPE |
|---|---|---|---|---|
| 303-484 | Denver | Denver | Teleport Communications America, Llc - CO | Landline |
| 303-485 | Boulder | Longmont | Qwest Corporation | Landline |
| 303-486 | Denver | Denver | Qwest Corporation | Landline |
| 303-487 | Denver | Denver | Qwest Corporation | Landline |
| 303-488 | Denver | Denver | Qwest Corporation | Landline |
| 303-489 | Adams | Westminster | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-490 | Denver | Denver | Usa Mobility Wireless, Inc. | Wireless |
| 303-491 | Denver | Denver | Usa Mobility Wireless, Inc. | Wireless |
| 303-492 | Denver | Denver | Qwest Corporation | Landline |
| 303-493 | Arapahoe | Englewood | Icg Telecom Group - CO | Landline |
| 303-494 | Denver | Denver | Qwest Corporation | Landline |
| 303-495 | Denver | Denver | Mcimetro Access Transmission Services Llc | Landline |
| 303-496 | Denver | Denver | Xo Colorado, Llc | Landline |
| 303-497 | Boulder | Boulder | Qwest Corporation | Landline |
| 303-498 | Adams | Brighton | Comcast Phone Of Colorado, Llc - CO | Landline |
| 303-499 | Denver | Denver | Qwest Corporation | Landline |
| 303-500 | Weld | Hudson | Level 3 Communications, Llc - CO | Landline |
| 303-501 | Adams | Westminster | Cellco Partnership Dba Verizon Wireless - CO | Landline |
| 303-502 | Weld | Fort Lupton | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-503 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-504 | Denver | Denver | Qwest Corporation | Landline |
| 303-505 | Arapahoe | Englewood | Sprint Spectrum L.p. | Wireless |
| 303-506 | Weld | Fort Lupton | New Cingular Wireless Pcs, Llc | Wireless |
| 303-507 | Denver | Denver | ||
| 303-508 | Denver | Denver | American Messaging Services, Llc | Wireless |
| 303-509 | Denver | Denver | American Messaging Services, Llc | Wireless |
| 303-510 | Denver | Denver | American Messaging Services, Llc | Wireless |
| 303-512 | Denver | Denver | Qwest Corporation | Landline |
| 303-513 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 303-514 | Arapahoe | Englewood | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-515 | Denver | Denver | Onvoy, Llc - CO | Landline |
| 303-516 | Denver | Denver | Qwest Corporation | Landline |
| 303-517 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 303-518 | Arapahoe | Aurora | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-519 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-520 | Denver | Denver | Sprint Spectrum L.p. | Wireless |
| 303-521 | Denver | Denver | Sprint Spectrum L.p. | Wireless |
| 303-522 | Arapahoe | Englewood | Sprint Spectrum L.p. | Wireless |
| 303-523 | Denver | Denver | T-Mobile Usa, Inc. | Wireless |
| 303-524 | Denver | Denver | Teleport Communications America, Llc - CO | Landline |
| 303-525 | Denver | Denver | Sprint Spectrum L.p. | Wireless |
| 303-526 | Jefferson | Golden | Qwest Corporation | Landline |
| 303-527 | Denver | Denver | Qwest Corporation | Landline |
| 303-528 | Denver | Denver | American Messaging Services, Llc | Wireless |
| 303-529 | Denver | Denver | Usa Mobility Wireless, Inc. | Wireless |
| 303-530 | Denver | Denver | Qwest Corporation | Landline |
| 303-531 | Denver | Denver | Mcimetro Access Transmission Services Llc | Landline |
| 303-532 | Boulder | Longmont | Mcleodusa Telecommunications Services, Inc.- CO | Landline |
| 303-533 | Broomfield | Broomfield | Qwest Corporation | Landline |
| 303-534 | Denver | Denver | Qwest Corporation | Landline |
| 303-535 | Denver | Denver | Cbeyond Communications, Llc - CO | Landline |
| 303-536 | Weld | Hudson | Qwest Corporation | Landline |
| 303-537 | Arapahoe | Aurora | Teleport Communications America, Llc - CO | Landline |
| 303-538 | Denver | Denver | Qwest Corporation | Landline |
| 303-539 | Arapahoe | Englewood | Xo Colorado, Llc | Landline |
| 303-540 | Denver | Denver | Usa Mobility Wireless, Inc. | Wireless |
| 303-541 | Boulder | Boulder | Qwest Corporation | Landline |
| 303-542 | Denver | Denver | Mcimetro Access Transmission Services Llc | Landline |
| 303-543 | Boulder | Boulder | Qwest Corporation | Landline |
| 303-544 | Denver | Denver | Qwest Corporation | Landline |
| 303-545 | Boulder | Boulder | Qwest Corporation | Landline |
| 303-546 | Denver | Denver | Qwest Corporation | Landline |
| 303-547 | Denver | Denver | Global Crossing Local Services, Inc.-Co | Landline |
| 303-548 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-549 | Arapahoe | Englewood | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-550 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-551 | Arapahoe | Englewood | Mcimetro Access Transmission Services Llc | Landline |
| 303-552 | Denver | Denver | Global Crossing Local Services, Inc.-Co | Landline |
| 303-553 | Denver | Denver | Usa Mobility Wireless, Inc. | Wireless |
| 303-554 | Denver | Denver | Qwest Corporation | Landline |
| Phone Number 303-879-9496 |
USAGE Wireless |
City Denver |
Operate Read more about who called from 3038799496 |
Update Time Mar-31-2025 |
| Phone Number 303-943-9452 |
USAGE Landline |
City Not available. |
Operate Read more about who called from 3039439452 |
Update Time Mar-31-2025 |
| Phone Number 303-423-1851 |
USAGE Landline |
City Denver |
Operate Read more about who called from 3034231851 |
Update Time Mar-31-2025 |
| Phone Number 303-874-8606 |
USAGE Landline |
City Denver |
Operate Read more about who called from 3038748606 |
Update Time Mar-31-2025 |
| Phone Number 303-276-4174 |
USAGE Landline |
City Denver |
Operate Read more about who called from 3032764174 |
Update Time Mar-31-2025 |
| Phone Number 303-468-0374 |
USAGE Landline |
City Denver |
Operate Read more about who called from 3034680374 |
Update Time Mar-31-2025 |
| Phone Number 303-615-0065 |
USAGE Landline |
City Denver |
Operate Read more about who called from 3036150065 |
Update Time Mar-31-2025 |
| Phone Number 303-879-3751 |
USAGE Wireless |
City Denver |
Operate Read more about who called from 3038793751 |
Update Time Mar-31-2025 |
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