WATERLO238 — MD
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | 2 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MD | 7325 | 2 |
| PAETEC ITEL, LLC | 829J | 2 |
| VERIZON MARYLAND, INC. | 9212 | 2 |
| BANDWIDTH.COM CLEC, LLC - MD | 071F | 1 |