Area Codes > 623 > Central Office Codes
| Exchange | Rate Center | State | Operating Company |
|---|---|---|---|
| 623-972 | PHOENIX | AZ | QWEST CORPORATION |
| 623-974 | PHOENIX | AZ | QWEST CORPORATION |
| 623-975 | PHOENIX | AZ | QWEST CORPORATION |
| 623-976 | AZ | ||
| 623-977 | PHOENIX | AZ | QWEST CORPORATION |
| 623-979 | PHOENIX | AZ | QWEST CORPORATION |
| 623-980 | PHOENIX | AZ | ALLTEL COMMUNICATIONS OF THE SOUTHWEST, LP - AZ |
| 623-986 | PHOENIX | AZ | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ |