FAIRFIELD — CT
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | 9147 | 5 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | 4 |
| LEVEL 3 COMMUNICATIONS, LLC - CT | 4800 | 2 |
| CABLEVISION LIGHTPATH, INC. - CT | 4950 | 2 |
| PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 539F | 2 |