Phone numbers in Cold Spring Harbor, New York
Cold Spring Harbor has 18 phone prefixes in area codes 363, 516, 631.
Biggest holders: MCImetro (Verizon Business), Verizon (local phone), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 6%
- Local phone company 28%
- Internet / business phone carrier 67%
Every prefix in Cold Spring Harbor
Search the first six digits of a number in this list. If it's here, the number started in Cold Spring Harbor with the carrier shown. If it isn't, check the New York page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 363-222 | Onvoy | Internet / business phone carrier | 2023 |
| 516-217 | Onvoy | Internet / business phone carrier | 2013 |
| 516-224 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 516-283 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 516-340 | Bandwidth | Internet / business phone carrier | 2010 |
| 516-367 | Verizon (local phone) | Local phone company | – |
| 516-422 | Verizon (local phone) | Local phone company | – |
| 516-685 | Lte Wireless | Mobile carrier | 2020 |
| 516-692 | Verizon (local phone) | Local phone company | – |
| 516-917 | Onvoy | Internet / business phone carrier | 2023 |
| 516-966 | Fractel | Internet / business phone carrier | 2020 |
| 631-367 | Verizon (local phone) | Local phone company | – |
| 631-498 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 631-534 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 631-659 | Cablevision Lightpath | Internet / business phone carrier | – |
| 631-692 | Verizon (local phone) | Local phone company | – |
| 631-763 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 631-857 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
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.