Canadial Know Who Called
← Area code 406

406-289 phone numbers

Numbers 406-289-0000 to 406-289-9999 are assigned to New Cingular Wireless PCS, LLC in Conrad, MT. 6 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 406-289-2xxx, 406-289-5xxx, 406-289-7xxx — calls from these use spoofed caller IDs.

Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.

Reported numbers in 406-289