641-255 phone numbers

Numbers 641-255-0000 to 641-255-9999 are assigned to T-Mobile USA, Inc. in Mason City, IA. 7 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 641-255-7xxx, 641-255-8xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 641-255