CUSTER — SD
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| VIVIAN TEL CO DBA GOLDEN WEST TELECOMMUNICATIONS | 1686 | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 1 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD | 6569 | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| VIVIAN TEL CO DBA GOLDEN WEST TELECOMMUNICATIONS | 1686 | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 1 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD | 6569 | 1 |