| District of California area codes: 831 | |
|---|---|
| Country | United States |
| State/Province | California |
| Major City | Salinas |
| Time Zone | Pacific |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 831-203 | Monterey | Salinas, CA | American Messaging Services |
| 831-204 | Monterey | Monterey, CA | Ymax Communications Corp. |
| 831-205 | San Benito | Hollister, CA | Teleport Communications Group - San Francisco |
| 831-206 | Monterey | Salinas, CA | Cellco Partnership DBA Verizon Wireless |
| 831-207 | San Benito | Hollister, CA | Sprint Spectrum L.p. |
| 831-210 | Monterey | Monterey, CA | T-mobile Usa |
| 831-212 | Santa Cruz | Santa Cruz, CA | Sprint Spectrum L.p. |
| 831-214 | Monterey | Salinas, CA | New Cingular Wireless PCS |
| 831-216 | Santa Cruz | Felton, CA | Teleport Communications Group - San Francisco |
| 831-217 | Santa Cruz | Boulder Creek, CA | Teleport Communications Group - San Francisco |
| 831-218 | Santa Cruz | Ben Lomond, CA | Teleport Communications Group - San Francisco |
| 831-219 | Santa Cruz | Aptos, CA | Teleport Communications Group - San Francisco |
| 831-221 | Monterey | San Ardo, CA | O1 Communications |
| 831-222 | Santa Cruz | Felton, CA | U.s. Telepacific Corp. |
| 831-223 | Monterey | Soledad, CA | Pac - West Telecomm |
| 831-224 | Monterey | Monterey, CA | T-mobile Usa |
| 831-227 | Santa Cruz | Santa Cruz, CA | Cellco Partnership DBA Verizon Wireless |
| 831-229 | Monterey | Salinas, CA | New Cingular Wireless PCS |
| 831-232 | Monterey | Salinas, CA | O1 Communications |
| 831-233 | Monterey | Salinas, CA | Level 3 Communications |
There are 334 prefixes, In the code area, the major cities are Hollister, CA;Marina, CA;Monterey, CA;Salinas, CA;. The major city is Salinas.