331-225 phone numbers

Numbers 331-225-0000 to 331-225-9999 are assigned to T-Mobile USA, Inc. in Elmhurst, IL. 7 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 331-225-7xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 331-225