CUMBERLAND — MD
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| VERIZON MARYLAND, INC. | 9212 | 9 |
| NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | 4 |
| USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD | 4720 | 3 |
| LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | 3 |
| OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | 3 |