Phone numbers in Round Lake, New York
Round Lake has 6 phone prefixes in area codes 518, 838.
Biggest holders: Firstlight Fiber, Charter / Spectrum, Peerless Network Of New York. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 17%
- Internet / business phone carrier 67%
- Phone company 17%
Every prefix in Round Lake
Search the first six digits of a number in this list. If it's here, the number started in Round Lake with the carrier shown. If it isn't, check the New York page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 518-289 | Firstlight Fiber | Internet / business phone carrier | – |
| 518-400 | Charter / Spectrum | Internet / business phone carrier | 2010 |
| 518-509 | Peerless Network Of New York | Internet / business phone carrier | 2016 |
| 518-899 | Verizon (local phone) | Local phone company | – |
| 838-400 | Fractel | Internet / business phone carrier | 2020 |
| 838-500 | Coretel New York | Phone company | 2019 |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.