435-580 phone numbers

Numbers 435-580-0000 to 435-580-9999 are assigned to T-Mobile USA, Inc. in Nephi, UT. 8 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 435-580-1xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 435-580