← Area code 406
406-238 phone numbers
Numbers 406-238-0000 to 406-238-9999 are assigned to Qwest Corporation in Billings, MT.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.
Numbers 406-238-0000 to 406-238-9999 are assigned to Qwest Corporation in Billings, MT.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.