Phone numbers in Monroe, New York
Monroe has 27 phone prefixes in area codes 329, 845.
Biggest holders: Frontier, Verizon Wireless, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 44%
- Local phone company 33%
- Internet / business phone carrier 15%
- Phone company 7%
Every prefix in Monroe
Search the first six digits of a number in this list. If it's here, the number started in Monroe with the carrier shown. If it isn't, check the New York page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 329-202 | Verizon Wireless | Mobile carrier | 2023 |
| 329-225 | Verizon Wireless | Mobile carrier | 2024 |
| 329-238 | Verizon Wireless | Mobile carrier | 2025 |
| 329-245 | AT&T Mobility | Mobile carrier | 2026 |
| 329-400 | Barr Tell USA | Phone company | 2025 |
| 845-238 | Verizon Wireless | Mobile carrier | 2002 |
| 845-248 | T-Mobile (including Sprint) | Mobile carrier | 2003 |
| 845-325 | Verizon Wireless | Mobile carrier | 2002 |
| 845-395 | Warwick Valley Telephone | Local phone company | 2009 |
| 845-492 | Frontier | Local phone company | 2001 |
| 845-500 | Frontier | Local phone company | 2009 |
| 845-537 | AT&T Mobility | Mobile carrier | 2001 |
| 845-604 | Onvoy | Internet / business phone carrier | 2018 |
| 845-637 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 845-655 | Frontier | Local phone company | 2010 |
| 845-662 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 845-751 | Windstream (PAETEC) | Internet / business phone carrier | 2005 |
| 845-774 | Frontier | Local phone company | – |
| 845-776 | Frontier | Local phone company | 2005 |
| 845-781 | Frontier | Local phone company | – |
| 845-782 | Frontier | Local phone company | – |
| 845-783 | Frontier | Local phone company | – |
| 845-799 | Xchange Telecom | Phone company | 2020 |
| 845-806 | MetroPCS (T-Mobile) | Mobile carrier | 2005 |
| 845-837 | AT&T Mobility | Mobile carrier | 2005 |
| 845-907 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 845-923 | Onvoy | Internet / business phone carrier | 2022 |
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.