NORTHFIELD — MA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |
| TC SYSTEMS, INC. | 7135 | 1 |
| ONVOY, LLC - MA | 892D | 1 |
| VERIZON NEW ENGLAND INC. | 9102 | 1 |
Data last updated: March 10, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | 1 |
| ONVOY SPECTRUM, LLC | 624H | 1 |
| TC SYSTEMS, INC. | 7135 | 1 |
| ONVOY, LLC - MA | 892D | 1 |
| VERIZON NEW ENGLAND INC. | 9102 | 1 |