WSNG236Z13 — MD
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| VERIZON MARYLAND, INC. | 9212 | 40 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 7 |
| SPOK, INC. | 6630 | 5 |
| BANDWIDTH.COM CLEC, LLC - MD | 071F | 4 |
| PAETEC ITEL, LLC | 829J | 4 |