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 |
|---|---|---|---|---|
| 303-988 | Jefferson | Denver | Qwest Corporation | Landline |
| 303-989 | Denver | Denver | Qwest Corporation | Landline |
| 303-990 | Adams | Westminster | Sprint Spectrum L.p. | Wireless |
| 303-991 | Denver | Denver | Xo Colorado, Llc | Landline |
| 303-992 | Denver | Denver | Qwest Corporation | Landline |
| 303-993 | Denver | Denver | Neutral Tandem-Colorado, Llc - CO | Landline |
| 303-994 | Arapahoe | Englewood | Sprint Spectrum L.p. | Wireless |
| 303-995 | Denver | Denver | Sprint Spectrum L.p. | Wireless |
| 303-996 | Denver | Denver | Eschelon Telecom Of Colorado, Inc. - CO | Landline |
| 303-997 | Denver | Denver | Comcast Phone Of Colorado, Llc - CO | Landline |
| 303-998 | Boulder | Boulder | Qwest Corporation | Landline |
| 303-999 | Denver | Denver | Comcast Phone Of Colorado, Llc - CO | Landline |
| Phone Number 303-201-8404 |
USAGE Wireless |
City Denver |
Operate Read more about who called from 3032018404 |
Update Time Mar-26-2026 |
| Phone Number 303-255-5348 |
USAGE Landline |
City Denver |
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Update Time Mar-26-2026 |
| Phone Number 303-256-1031 |
USAGE Landline |
City Denver |
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Update Time Mar-26-2026 |
| Phone Number 303-982-0741 |
USAGE Landline |
City Denver |
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Update Time Mar-26-2026 |
| Phone Number 303-659-1181 |
USAGE Landline |
City Brighton |
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Update Time Mar-26-2026 |
| Phone Number 303-242-3254 |
USAGE Landline |
City Westminster |
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Update Time Mar-26-2026 |
| Phone Number 303-350-3027 |
USAGE Landline |
City Denver |
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Update Time Mar-26-2026 |
| Phone Number 303-246-6517 |
USAGE Wireless |
City Englewood |
Operate Read more about who called from 3032466517 |
Update Time Mar-26-2026 |
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