TOPEKA — KS
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| SOUTHWESTERN BELL | 9533 | 42 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS | 6532 | 7 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 7 |
| AERIAL COMMUNICATIONS, INC. | 6701 | 6 |
| ONVOY, LLC - KS | 205F | 4 |