Phone numbers in Mt. Vernon, Washington
Mt. Vernon has 50 phone prefixes in area codes 360, 564.
Biggest holders: Ziply Fiber, Verizon Wireless, T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 38%
- Local phone company 48%
- Internet / business phone carrier 14%
Every prefix in Mt. Vernon
Search the first six digits of a number in this list. If it's here, the number started in Mt. Vernon with the carrier shown. If it isn't, check the Washington page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 360-202 | AT&T Mobility | Mobile carrier | – |
| 360-230 | Teleport Communications America | Internet / business phone carrier | – |
| 360-293 | Ziply Fiber | Local phone company | – |
| 360-299 | Ziply Fiber | Local phone company | – |
| 360-333 | Verizon Wireless | Mobile carrier | – |
| 360-336 | Ziply Fiber | Local phone company | – |
| 360-391 | Verizon Wireless | Mobile carrier | – |
| 360-395 | Teleport Communications America | Internet / business phone carrier | – |
| 360-399 | Verizon Wireless | Mobile carrier | – |
| 360-404 | Onvoy | Internet / business phone carrier | – |
| 360-416 | Ziply Fiber | Local phone company | – |
| 360-419 | Ziply Fiber | Local phone company | – |
| 360-420 | AT&T Mobility | Mobile carrier | – |
| 360-421 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 360-422 | Ziply Fiber | Local phone company | – |
| 360-424 | Ziply Fiber | Local phone company | – |
| 360-428 | Ziply Fiber | Local phone company | – |
| 360-429 | Ziply Fiber | Local phone company | – |
| 360-445 | Ziply Fiber | Local phone company | – |
| 360-466 | Ziply Fiber | Local phone company | – |
| 360-488 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 360-503 | Verizon Wireless | Mobile carrier | – |
| 360-540 | T-Mobile (including Sprint) | Mobile carrier | – |
| 360-542 | Skyetel | Internet / business phone carrier | – |
| 360-588 | Ziply Fiber | Local phone company | – |
| 360-610 | T-Mobile (including Sprint) | Mobile carrier | – |
| 360-630 | Verizon Wireless | Mobile carrier | – |
| 360-661 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 360-707 | Ziply Fiber | Local phone company | – |
| 360-708 | Verizon Wireless | Mobile carrier | – |
| 360-724 | Ziply Fiber | Local phone company | – |
| 360-755 | Ziply Fiber | Local phone company | – |
| 360-757 | Ziply Fiber | Local phone company | – |
| 360-766 | Ziply Fiber | Local phone company | – |
| 360-770 | Verizon Wireless | Mobile carrier | – |
| 360-814 | Teleport Communications America | Internet / business phone carrier | – |
| 360-826 | Ziply Fiber | Local phone company | – |
| 360-840 | T-Mobile (including Sprint) | Mobile carrier | – |
| 360-848 | Ziply Fiber | Local phone company | – |
| 360-853 | Ziply Fiber | Local phone company | – |
| 360-854 | Ziply Fiber | Local phone company | – |
| 360-855 | Ziply Fiber | Local phone company | – |
| 360-856 | Ziply Fiber | Local phone company | – |
| 360-873 | Ziply Fiber | Local phone company | – |
| 360-899 | Verizon Wireless | Mobile carrier | – |
| 360-941 | AT&T Mobility | Mobile carrier | – |
| 360-982 | T-Mobile (including Sprint) | Mobile carrier | – |
| 564-260 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 564-268 | T-Mobile (including Sprint) | Mobile carrier | 2026 |
| 564-900 | Onvoy | Internet / business phone carrier | 2021 |
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.