NEW CASTLE — DE
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | 13 |
| VERIZON DELAWARE, INC. | 9210 | 8 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 5 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7309 | 3 |
| PAETEC ITEL, LLC | 829J | 3 |