WSNG236Z14 — MD
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| VERIZON MARYLAND, INC. | 9212 | 12 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 4 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - DC | 7529 | 4 |
| PAETEC ITEL, LLC | 829J | 4 |
| LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | 3 |