MOUNT AIRY — MD
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | 2 |
| BANDWIDTH.COM CLEC, LLC - MD | 071F | 1 |
| CORE COMMUNICATIONS, INC.- MD | 2593 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | 1 |
| AT&T - LOCAL | 7421 | 1 |