DOVER — MA
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | 4 |
| LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | 2 |
| VERIZON NEW ENGLAND INC. | 9102 | 2 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 1 |
| BANDWIDTH.COM CLEC, LLC - MA | 990E | 1 |