FIREISLAND — NY
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| ONVOY, LLC- NY | 384C | 2 |
| LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | 2 |
| TC SYSTEMS, INC. - NY | 7140 | 1 |
| VERIZON NEW YORK, INC. | 9104 | 1 |
| BANDWIDTH.COM CLEC, LLC - NY | 997E | 1 |