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 |
|---|---|---|---|---|
| 303-841 | Douglas | Parker | Qwest Corporation | Landline |
| 303-842 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-843 | Arapahoe | Englewood | Qwest Corporation | Landline |
| 303-844 | Denver | Denver | Qwest Corporation | Landline |
| 303-845 | Arapahoe | Aurora | Teleport Communications America, Llc - CO | Landline |
| 303-846 | Denver | Denver | Qwest Corporation | Landline |
| 303-847 | Denver | Denver | Level 3 Communications, Llc - CO | Landline |
| 303-848 | Boulder | Longmont | Icg Telecom Group - CO | Landline |
| 303-849 | Weld | Roggen | Roggen Telephone Cooperative Co. | Landline |
| 303-850 | Denver | Denver | Qwest Corporation | Landline |
| 303-851 | Denver | Denver | Usa Mobility Wireless, Inc. | Wireless |
| 303-852 | Denver | Denver | Usa Mobility Wireless, Inc. | Wireless |
| 303-853 | Adams | Commerce City | Qwest Corporation | Landline |
| 303-854 | Denver | Denver | Icg Telecom Group - CO | Landline |
| 303-855 | Denver | Denver | Usa Mobility Wireless, Inc. | Wireless |
| 303-856 | Denver | Denver | Icg Telecom Group - CO | Landline |
| 303-857 | Weld | Fort Lupton | Qwest Corporation | Landline |
| 303-858 | Denver | Denver | Qwest Corporation | Landline |
| 303-859 | Adams | Westminster | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-860 | Denver | Denver | Qwest Corporation | Landline |
| 303-861 | Denver | Denver | Qwest Corporation | Landline |
| 303-862 | Denver | Denver | Comcast Phone Of Colorado, Llc - CO | Landline |
| 303-863 | Denver | Denver | Qwest Corporation | Landline |
| 303-864 | Denver | Denver | Qwest Corporation | Landline |
| 303-865 | Arapahoe | Englewood | Icg Telecom Group - CO | Landline |
| 303-866 | Denver | Denver | Qwest Corporation | Landline |
| 303-867 | Denver | Denver | Iloka, Inc. Dba Newcloud Networks - CO | Landline |
| 303-868 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-869 | Denver | Denver | Qwest Corporation | Landline |
| 303-870 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-871 | Denver | Denver | Qwest Corporation | Landline |
| 303-872 | Denver | Denver | Level 3 Communications, Llc - CO | Landline |
| 303-873 | Arapahoe | Aurora | Qwest Corporation | Landline |
| 303-874 | Denver | Denver | Icg Telecom Group - CO | Landline |
| 303-875 | Denver | Denver | T-Mobile Usa, Inc. | Wireless |
| 303-876 | Denver | Denver | Mcimetro Access Transmission Services Llc | Landline |
| 303-877 | Arapahoe | Englewood | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-878 | Denver | Denver | Usa Mobility Wireless, Inc. | Wireless |
| 303-879 | Denver | Denver | Usa Mobility Wireless, Inc. | Wireless |
| 303-880 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-881 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 303-882 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 303-883 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 303-884 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 303-885 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 303-886 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 303-887 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 303-888 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 303-889 | Arapahoe | Englewood | Qwest Corporation | Landline |
| 303-890 | Denver | Denver | Usa Mobility Wireless, Inc. | Wireless |
| 303-891 | Denver | Denver | Usa Mobility Wireless, Inc. | Wireless |
| 303-892 | Denver | Denver | Qwest Corporation | Landline |
| 303-893 | Denver | Denver | Qwest Corporation | Landline |
| 303-894 | Denver | Denver | Qwest Corporation | Landline |
| 303-895 | Arapahoe | Aurora | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-896 | Denver | Denver | Qwest Corporation | Landline |
| 303-897 | Denver | Denver | Usa Mobility Wireless, Inc. | Wireless |
| 303-898 | Denver | Denver | New Cingular Wireless Pcs, Llc | Wireless |
| 303-899 | Denver | Denver | Qwest Corporation | Landline |
| 303-900 | Clear Creek | Georgetown | Level 3 Communications, Llc - CO | Landline |
| 303-901 | Arapahoe | Englewood | Sprint Spectrum L.p. | Wireless |
| 303-902 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-903 | Adams | Westminster | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-904 | Denver | Denver | Qwest Corporation | Landline |
| 303-905 | Adams | Westminster | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-906 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-907 | Adams | Westminster | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-908 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-909 | Adams | Westminster | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 303-910 | Denver | Denver | Cellco Partnership Dba Verizon Wireless - CO | Wireless |
| 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 |
Operate Read more about who called from 3032555348 |
Update Time Mar-26-2026 |
| Phone Number 303-256-1031 |
USAGE Landline |
City Denver |
Operate Read more about who called from 3032561031 |
Update Time Mar-26-2026 |
| Phone Number 303-982-0741 |
USAGE Landline |
City Denver |
Operate Read more about who called from 3039820741 |
Update Time Mar-26-2026 |
| Phone Number 303-659-1181 |
USAGE Landline |
City Brighton |
Operate Read more about who called from 3036591181 |
Update Time Mar-26-2026 |
| Phone Number 303-242-3254 |
USAGE Landline |
City Westminster |
Operate Read more about who called from 3032423254 |
Update Time Mar-26-2026 |
| Phone Number 303-350-3027 |
USAGE Landline |
City Denver |
Operate Read more about who called from 3033503027 |
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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