The 925 area code is a telephone area code serving a northern part of the U. To start a free reverse phone lookup, simply enter the full 10-digit number (including the 925 area code) below and access available caller information such as name, address, and more.
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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 January 1, 1947.
Our reverse phone lookup will analyze the three-digit prefix of any 925 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.
| 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 |
| 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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