650 Area Code
The 650 area code serves the San Francisco Bay Area in the U.S. state of California.
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The 650 area code serves the San Francisco Bay Area in the U.S. state of California.
Federal Data
State Data
County Data
City Data
Phone numbers with the 650 area code prefix originate from San Mateo County, portions of San Francisco, and the northwestern part of Santa Clara County in California. It was split from area code 415 on August 2, 1997.
Area code 650 is a general purpose code which was placed in service on August 2, 1997.
Our California phone number lookup service will analyze the three-digit prefix of any 650 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 | 264 |
| NEW CINGULAR WIRELESS PCS, LLC | 43 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 32 |
| SPRINT SPECTRUM, L.P. | 26 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 23 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 22 |
| T-MOBILE USA, INC. | 21 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 18 |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 18 |
| ONVOY, LLC - CA | 17 |
| XO CALIFORNIA, INC. | 12 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 9 |
| METROPCS, INC. | 8 |
| O1 COMMUNICATIONS, INC. - CA | 8 |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7 |
| AT&T - LOCAL | 6 |
| GLOBAL CROSSING LOCAL SERVICES, INC. - CA | 6 |
| ASTOUND BROADBAND, LLC - CA | 5 |
| BANDWIDTH.COM CLEC, LLC - CA | 5 |
| AMERICAN MESSAGING SERVICES, LLC | 4 |
| COMCAST IP PHONE, LLC | 3 |
| UTILITY TELECOM GROUP, LLC - CA | 3 |
| USA MOBILITY WIRELESS, INC. | 2 |
| AIRESPRING, INC. | 1 |
| AT&T CORP. | 1 |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 1 |
| RCLEC, INC. | 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 |
|---|---|
| PALO ALTO | 125 |
| SAN MATEO | 106 |
| SSNFRNCSCO | 73 |
| MT VIEW | 70 |
| REDWOOD CY | 57 |
| SNCRL-BLMT | 36 |
| LOS ALTOS | 21 |
| SNFC JUNPR | 19 |
| MILLBRAE | 15 |
| HALFMOONBY | 12 |
| PACIFICA | 10 |
| PESCADERO | 9 |
| WOODSIDE | 8 |
| MOSS BEACH | 3 |
| LA HONDA | 2 |
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