Look up any phone number starting with 925 to identify the owner name, address, spam reports, and more. The 925 area code is a telephone area code serving a northern part of the U.S. state of California.
Enter a full 10-digit number to identify the caller and whether it has been reported as spam.
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The numbering plan area includes southeastern Alameda County (Dublin, Pleasanton, Livermore, Sunol, and unincorporated areas surrounding those communities), and all of Contra Costa County except the western part (El Cerrito to Crockett).
Area code 925 is a general purpose code which was placed in service on March 14, 1998.
Our California phone number lookup for the 925 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 | 199 |
| NEW CINGULAR WIRELESS PCS, LLC | 39 |
| SPRINT SPECTRUM, L.P. | 32 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 26 |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 25 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 24 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 16 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 15 |
| T-MOBILE USA, INC. | 12 |
| XO CALIFORNIA, INC. | 12 |
| O1 COMMUNICATIONS, INC. - CA | 10 |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 9 |
| MATRIX TELECOM, LLC. S/I/I TNCI - CA | 9 |
| BANDWIDTH.COM CLEC, LLC - CA | 6 |
| COMCAST IP PHONE, LLC | 6 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 6 |
| METROPCS, INC. | 5 |
| GLOBAL CROSSING LOCAL SERVICES, INC. - CA | 4 |
| AT&T - LOCAL | 3 |
| ONVOY, LLC - CA | 3 |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 2 |
| AT&T CORP. | 1 |
| GETGO COMMUNICATIONS 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 |
|---|---|
| WALNUT CRK | 78 |
| CONCORD | 70 |
| PLEASANTON | 69 |
| ANTIOCH | 43 |
| LIVERMORE | 37 |
| DUBLN-SNRM | 35 |
| BSHP RNCH | 30 |
| DANVILLE | 28 |
| ECONTRCOST | 12 |
| MARTINEZ | 12 |
| PITTSBURG | 10 |
| CLAYTON | 9 |
| LAFAYETTE | 9 |
| ORINDA | 8 |
| MORAGA | 7 |
| PSBG WEST | 5 |
| SUNOL | 4 |
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