The 720 area code is a telephone area code serving the north-central portion of Colorado, including Denver and Boulder, as well as their surrounding suburbs. To start a free reverse phone lookup, simply enter the full 10-digit number (including the 720 area code) below and access available caller information such as name, address, and more.
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Area code 720 covers the same geographic area as area code 303. This includes Denver, Boulder, and their surrounding suburbs in north-central Colorado.
Area code 720 is part of an overlay complex with area codes 303 and 983, meaning they serve the same geographic region. Area code 303 was the original area code, established in 1947. Area code 720 was added in 1998, and area code 983 was activated on June 17, 2022. Ten-digit dialing is required for all calls made within this service area.
Area code 720 is a General Purpose Code which was placed in service on January 1, 1947.
Our reverse phone lookup will analyze the three-digit prefix of any 720 area code phone number and will show which telecommunications company and rate center it was initially assigned to. This prefix code data may help to determine the U.S. carrier, Colorado geographic region, and local calling area associated with the phone number.
| Company | Number of Prefixes |
|---|---|
| T-MOBILE USA, INC. | 104 |
| QWEST CORPORATION | 100 |
| NEW CINGULAR WIRELESS PCS, LLC | 78 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 49 |
| XO COLORADO, LLC | 38 |
| LEVEL 3 COMMUNICATIONS, LLC - CO | 36 |
| BANDWIDTH.COM CLEC, LLC - CO | 27 |
| ONVOY, LLC - CO | 22 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CO | 22 |
| ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 17 |
| LEVEL 3 TELECOM OF COLORADO, LLC - CO | 15 |
| COMCAST IP PHONE, LLC | 14 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 10 |
| MCLEODUSA TELECOMMUNICATION SERVICES, INC. - CO | 9 |
| METROPCS, INC. | 8 |
| AT&T - LOCAL | 7 |
| PEERLESS NETWORK OF COLORADO, LLC - CO | 6 |
| GLOBAL CROSSING LOCAL SERVICES, INC. - CO | 5 |
| CENTURYLINK COMMUNICATIONS, LLC | 4 |
| COMMNET WIRELESS, LLC | 2 |
| PACOPTIC NETWORKS, LLC - CO | 2 |
| TELIAX, INC. - CO | 2 |
| ADVANCED TELECOM SOLUTIONS, LLC | 1 |
| FASTTRACK COMMUNICATIONS, INC. - CO | 1 |
| ILOKA, INC. DBA NEWCLOUD NETWORKS - CO | 1 |
| NUSO, LLC | 1 |
| ONVOY SPECTRUM, LLC | 1 |
| RCLEC, INC. - CO | 1 |
| TELNYX LLC | 1 |
| THE VOICE APPLICATION NETWORK, LLC | 1 |
| VONAGE AMERICA LLC | 1 |
| WIDE VOICE, LLC - CO | 1 |
| YMAX COMMUNICATIONS CORP. - CO | 1 |
| ZIPPYTECH INCORPORATED | 1 |
| Rate Center | Number of Prefixes |
|---|---|
| DENVER | 546 |
| LONGMONT | 21 |
| FORTLUPTON | 5 |
| KEENESBURG | 4 |
| ALLNSPKLYN | 3 |
| DECKERS | 3 |
| GEORGETOWN | 3 |
| HUDSON | 3 |
| DEER TRAIL | 1 |
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