ISLIP — NY
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| VERIZON NEW YORK, INC. | 9104 | 4 |
| CABLEVISION LIGHTPATH, INC. - NY | 7126 | 2 |
| LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | 1 |
| CSC VOICE, LLC | 612K | 1 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | 1 |