Look up any phone number starting with 628 to identify the owner name, address, spam reports, and more. The 628 area code serves the city of San Francisco and its northern suburbs in Marin County, and the northeast corner of San Mateo County in California.
Enter a full 10-digit number to identify the caller and whether it has been reported as spam.
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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 March 21, 2015.
Our California phone number lookup for the 628 area code analyzes the three-digit prefix to identify the initially assigned telecommunications company and rate center. This prefix code data may help to determine the U.S. carrier, California geographic region, and local calling area associated with the phone number.
Phone numbers follow the following structure under the North American Numbering Plan:
Understanding the area code can help you determine if a call is local to your area. However, keep in mind that due to mobile number portability and VoIP services, the caller may be anywhere in the United States, so it’s best to search for the most recent phone number details.
| 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 |
Carrier names have been updated from their original FCC assignments to reflect current companies following mergers, acquisitions, and rebranding. Updates were determined using AI-assisted research and may not be accurate or reflect up to date changes. This data is provided without warranties of accuracy or completeness.
| 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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