Look up any phone number starting with 831 to identify the owner name, address, spam reports, and more. The 831 area code is a telephone area code serving a small region of California.
Enter a full 10-digit number to identify the caller and whether it has been reported as spam.
Federal Data
State Data
County Data
City Data
The 831 area code covers Big Sur, Monterey Bay, the Salinas Valley, and the southwestern Santa Cruz Mountains.
Area code 831 was created in 1998 from area code 408 .
Area code 831 is a general purpose code which was placed in service on July 11, 1998.
Our California phone number lookup for the 831 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 | 118 |
| NEW CINGULAR WIRELESS PCS, LLC | 23 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 21 |
| SPRINT SPECTRUM, L.P. | 13 |
| O1 COMMUNICATIONS, INC. - CA | 9 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 5 |
| T-MOBILE USA, INC. | 4 |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 3 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 3 |
| ONVOY, LLC - CA | 3 |
| AT&T - LOCAL | 2 |
| AT&T CORP. | 2 |
| COMCAST IP PHONE, LLC | 2 |
| MATRIX TELECOM, LLC. S/I/I TNCI - CA | 2 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2 |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 2 |
| AMERICAN MESSAGING SERVICES, LLC | 1 |
| BANDWIDTH.COM CLEC, LLC - CA | 1 |
| CHARTER FIBERLINK CA-CCO, LLC - CA | 1 |
| METROPCS, INC. | 1 |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 1 |
| PINNACLES TEL. CO. | 1 |
| TWILIO INTERNATIONAL, INC. | 1 |
| US TELEPACIFIC CORP. - CA | 1 |
| UTILITY TELECOM GROUP, LLC - CA | 1 |
| WAVENATION, LLC | 1 |
| XO CALIFORNIA, INC. | 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 |
|---|---|
| SANTA CRUZ | 54 |
| SALINAS | 52 |
| MONTEREY | 46 |
| WATSONVL | 17 |
| HOLLISTER | 13 |
| APTOS | 9 |
| CARMEL | 8 |
| BEN LOMOND | 5 |
| BOULDERCRK | 2 |
| CASTROVL | 2 |
| CHUALAR | 2 |
| FELTON | 2 |
| KING CITY | 2 |
| SAN JUAN | 2 |
| SOLEDAD | 2 |
| BIG SUR | 1 |
| CARMEL VLY | 1 |
| GONZALES | 1 |
| GREENFIELD | 1 |
| PINNACLES | 1 |
| SAN ARDO | 1 |
| SAN LUCAS | 1 |
| TRES PINOS | 1 |
Browse California area codes for phone number lookup: