POOLESVL — MD
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| PEERLESS NETWORK OF MARYLAND, LLC | 568G | 2 |
| LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | 1 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | 1 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 1 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - DC | 7529 | 1 |