Area Codes > 657 > Central Office Codes
| Exchange | Rate Center | State | Operating Company |
|---|---|---|---|
| 657-211 | CA | ||
| 657-311 | CA | ||
| 657-411 | CA | ||
| 657-464 | HUNTITNBCH | CA | COX CALIFORNIA TELCOM, INC. - CA |
| 657-511 | CA | ||
| 657-555 | CA | MULTIPLE OCN LISTING | |
| 657-611 | CA | ||
| 657-700 | CA | ||
| 657-711 | CA | ||
| 657-714 | CA | ||
| 657-811 | CA | ||
| 657-859 | SANTA ANA | CA | COX CALIFORNIA TELCOM, INC. - CA |
| 657-911 | CA | ||
| 657-950 | CA | ||
| 657-958 | CA | ||
| 657-959 | CA | ||
| 657-976 | CA | VERIZON CALIFORNIA INC.-CA (GTE) |