← Area code 681
681-421 phone numbers
Numbers 681-421-0000 to 681-421-9999 are assigned to Armstrong Telecommunications, Inc. in Ellenboro, WV.
Not assigned to any carrier: 681-421-0xxx, 681-421-1xxx, 681-421-3xxx, 681-421-4xxx, 681-421-5xxx, 681-421-6xxx, 681-421-7xxx, 681-421-8xxx, 681-421-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.