DARLINGTON — MD
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| BANDWIDTH.COM CLEC, LLC - MD | 071F | 1 |
| CORE COMMUNICATIONS, INC.- MD | 2593 | 1 |
| FIVE9, INC. | 598J | 1 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MD | 7325 | 1 |
| PAETEC ITEL, LLC | 829J | 1 |