GREENWICH — CT
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| VERIZON NEW YORK, INC. | 9104 | 11 |
| CABLEVISION LIGHTPATH, INC. - CT | 4950 | 5 |
| CSC VOICE, LLC | 612K | 4 |
| ONVOY, LLC - CT | 639C | 4 |
| LEVEL 3 COMMUNICATIONS, LLC - CT | 4800 | 2 |