WALTHAM — MA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| VERIZON NEW ENGLAND INC. | 9102 | 31 |
| NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | 12 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 9 |
| TC SYSTEMS, INC. | 7135 | 6 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | 5 |