415 Area Code
The 415 area code is serving San Francisco and its northern suburbs in Marin County, and the northeast corner of San Mateo County in California.
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State Data
County Data
City Data
The 415 area code is serving San Francisco and its northern suburbs in Marin County, and the northeast corner of San Mateo County in California.
Federal Data
State Data
County Data
City Data
Area code 415 covers the city and county of San Francisco, Marin County, and the northeast corner of San Mateo County.
Area code 628 was assigned in 2015 to form an overlay with area code 415 in the same geographic region. Ten-digit dialing is mandatory in the area, with prefix *1* from landlines.
Area code 415 is a general purpose code which was placed in service on January 1, 1947.
Our California phone number lookup service will analyze the three-digit prefix of any 415 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.
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 |
|---|---|
| PACIFIC BELL | 326 |
| NEW CINGULAR WIRELESS PCS, LLC | 64 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 45 |
| SPRINT SPECTRUM, L.P. | 37 |
| ONVOY, LLC - CA | 34 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 28 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 27 |
| BANDWIDTH.COM CLEC, LLC - CA | 26 |
| T-MOBILE USA, INC. | 22 |
| USA MOBILITY WIRELESS, INC. | 20 |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 19 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 17 |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 14 |
| O1 COMMUNICATIONS, INC. - CA | 12 |
| XO CALIFORNIA, INC. | 11 |
| AMERICAN MESSAGING SERVICES, LLC | 8 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 8 |
| FRONTIER CALIFORNIA INC. | 6 |
| UTILITY TELECOM GROUP, LLC - CA | 6 |
| GLOBAL CROSSING LOCAL SERVICES, INC. - CA | 5 |
| METROPCS, INC. | 5 |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 5 |
| COMCAST IP PHONE, LLC | 3 |
| 33 WIRELESS INC. | 2 |
| ASTOUND BROADBAND, LLC - CA | 2 |
| AT&T - LOCAL | 2 |
| AT&T CORP. | 2 |
| NORTH COUNTY COMMUNICATION CORPORATION - CA | 2 |
| CENTURYLINK COMMUNICATIONS, LLC | 1 |
| ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 1 |
| GETGO COMMUNICATIONS LLC - CA | 1 |
| IP HORIZON LLC | 1 |
| LOCAL ACCESS SERVICES LLC - CA | 1 |
| NUSO, LLC | 1 |
| PACIFIC BELL (COMPETITIVE) | 1 |
| PAETEC COMMUNICATIONS, INC. - CA | 1 |
| RACE TELECOMMUNICATIONS, INC. - CA | 1 |
| RCLEC, INC. | 1 |
| TWILIO INTERNATIONAL, INC. | 1 |
| WIDE VOICE, LLC - CA | 1 |
| YMAX COMMUNICATIONS CORP. - CA | 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 | 472 |
| SAN RAFAEL | 63 |
| SNFC MT-EV | 61 |
| SNFC JUNPR | 53 |
| NOVATO | 21 |
| SAUSALITO | 17 |
| MILLVALLEY | 16 |
| BELVEDERE | 15 |
| CORTEMADRA | 13 |
| IGNACIO | 13 |
| POINTREYES | 8 |
| STNSN-BLNS | 8 |
| NICASIO | 6 |
| INVERNESS | 5 |
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