← Area code 509
509-256 phone numbers
Numbers 509-256-0000 to 509-256-9999 are assigned to Asotin Tel Co in Anatone, WA.
Not assigned to any carrier: 509-256-0xxx, 509-256-1xxx, 509-256-2xxx, 509-256-4xxx, 509-256-5xxx, 509-256-6xxx, 509-256-7xxx, 509-256-8xxx, 509-256-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.