Phone numbers in Brewster, Washington
Brewster has 4 phone prefixes in area code 509.
Biggest holders: Level 3 (Lumen), Onvoy, Ziply Fiber. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 25%
- Local phone company 25%
- Internet / business phone carrier 50%
Every prefix in Brewster
Search the first six digits of a number in this list. If it's here, the number started in Brewster with the carrier shown. If it isn't, check the Washington page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 509-587 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 509-645 | Onvoy | Internet / business phone carrier | – |
| 509-689 | Ziply Fiber | Local phone company | – |
| 509-733 | AT&T Mobility | Mobile 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.