The 628 area code is a telephone area code serving the city of San Francisco and its northern suburbs in Marin County, and the northeast corner of San Mateo County in California. To start a free reverse phone lookup, simply enter the full 10-digit number (including the 628 area code) below and access available caller information such as name, address, and more.
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Area code 628 covers the same geographic region as area code 415, including the City and County of San Francisco, all of Marin County, and parts of San Mateo County.
Area code 628 is an overlay to area code 415, meaning they serve the same geographic area. Area code 415 was established in 1947. Area code 628 was added on February 21, 2015. Ten-digit dialing is mandatory in this area.
Area code 628 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 628 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, California geographic region, and local calling area associated with the phone number.
| Company | Number of Prefixes |
|---|---|
| ONVOY, LLC - CA | 8 |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 3 |
| T-MOBILE USA, INC. | 3 |
| BANDWIDTH.COM CLEC, LLC - CA | 2 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2 |
| NEW CINGULAR WIRELESS PCS, LLC | 2 |
| PACIFIC BELL | 2 |
| CENTURYLINK COMMUNICATIONS, LLC | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 1 |
| SONIC TELECOM, LLC - CA | 1 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 1 |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 1 |
| Rate Center | Number of Prefixes |
|---|---|
| SNFC CNTRL | 14 |
| SNFC MT-EV | 4 |
| BELVEDERE | 2 |
| SAN RAFAEL | 2 |
| STNSN-BLNS | 2 |
| CORTEMADRA | 1 |
| INVERNESS | 1 |
| SNFC JUNPR | 1 |
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