TOPSFIELD — MA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 2 |
| VERIZON NEW ENGLAND INC. | 9102 | 2 |
| COMCAST IP PHONE, LLC | 318J | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | 1 |
| PAETEC ITEL, LLC | 829J | 1 |