Look up any phone number starting with 510 to identify the owner name, address, spam reports, and more. The 510 area code is a telephone area code serving much of the East Bay 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 510 covers the western portion of the East Bay region of California. It includes cities in Alameda and Contra Costa counties. Specifically, it covers almost everything west of the Berkeley Hills.
Area code 510 is part of an overlay complex with area code 341 . Area code 510 was established on September 2, 1991. Area code 341 was introduced on July 22, 2019. Ten-digit dialing is mandatory in this region.
Area code 510 is a general purpose code which was placed in service on September 2, 1991.
Our California phone number lookup for the 510 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 |
|---|---|
| PACIFIC BELL | 268 |
| NEW CINGULAR WIRELESS PCS, LLC | 69 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 55 |
| SPRINT SPECTRUM, L.P. | 53 |
| T-MOBILE USA, INC. | 28 |
| ONVOY, LLC - CA | 24 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 23 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 21 |
| BANDWIDTH.COM CLEC, LLC - CA | 17 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 17 |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 17 |
| COMCAST IP PHONE, LLC | 10 |
| XO CALIFORNIA, INC. | 10 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 9 |
| METROPCS, INC. | 9 |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 8 |
| USA MOBILITY WIRELESS, INC. | 7 |
| GLOBAL CROSSING LOCAL SERVICES, INC. - CA | 6 |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 5 |
| UTILITY TELECOM GROUP, LLC - CA | 5 |
| O1 COMMUNICATIONS, INC. - CA | 4 |
| AMERICAN MESSAGING SERVICES, LLC | 2 |
| AT&T CORP. | 2 |
| NORTH COUNTY COMMUNICATION CORPORATION - CA | 2 |
| CENTURYLINK COMMUNICATIONS, LLC | 1 |
| GETGO COMMUNICATIONS LLC - CA | 1 |
| INTEGRATED PATH COMMUNICATIONS, LLC - CA | 1 |
| PAETEC COMMUNICATIONS, INC. - 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 |
|---|---|
| OKLD MN-PD | 186 |
| HAYWARD | 103 |
| FRNK MAIN | 69 |
| OKLD BKLY | 65 |
| OKLD TRNID | 53 |
| RICHMOND | 42 |
| FRNK OLIVR | 37 |
| OKLD ALMD | 34 |
| OKLD FRTVL | 30 |
| FRNK GRNLF | 21 |
| ELSBR-PINL | 19 |
| HRCUL-RODE | 11 |
| CROCKETT | 5 |
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