406-574 phone numbers

Numbers 406-574-0000 to 406-574-9999 are assigned to Qwest Corporation (rate centre SILVERTIP, MT, NANPA abbreviation). 7 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 406-574-9xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 406-574