WINTHROP — MA
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| ONVOY, LLC - MA | 892D | 2 |
| VERIZON NEW ENGLAND INC. | 9102 | 2 |
| COMCAST IP PHONE, LLC | 318J | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | 1 |
| METROPCS, INC. | 5562 | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| ONVOY, LLC - MA | 892D | 2 |
| VERIZON NEW ENGLAND INC. | 9102 | 2 |
| COMCAST IP PHONE, LLC | 318J | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | 1 |
| METROPCS, INC. | 5562 | 1 |