MARK, IA Rate Center
MARK — IA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| CITIZENS MUTUAL TELEPHONE COOPERATIVE | 1129 | 1 |
Data last updated: March 10, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| CITIZENS MUTUAL TELEPHONE COOPERATIVE | 1129 | 1 |