605-308 phone numbers

Numbers 605-308-0000 to 605-308-9999 are assigned to T-Mobile USA, Inc. (rate centre NOSIOUX CY, SD, NANPA abbreviation). 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 605-308-1xxx, 605-308-2xxx, 605-308-3xxx, 605-308-4xxx, 605-308-6xxx, 605-308-7xxx, 605-308-8xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 605-308