WORTHINGTN — MD
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| ONVOY, LLC - MD | 876D | 2 |
| LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | 1 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MD | 7325 | 1 |
| PAETEC ITEL, LLC | 829J | 1 |
| VERIZON MARYLAND, INC. | 9212 | 1 |