NEWUNDERWD — SD
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| GOLDEN WEST TEL COOP INC DBA GOLDEN WEST TELECOMM | 1659 | 1 |
| BOOST SUBSCRIBERCO L.L.C. | 490J | 1 |
Data last updated: March 10, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| GOLDEN WEST TEL COOP INC DBA GOLDEN WEST TELECOMM | 1659 | 1 |
| BOOST SUBSCRIBERCO L.L.C. | 490J | 1 |