← Area code 309
309-232 phone numbers
Numbers 309-232-0000 to 309-232-9999 are assigned to United States Cellular in Peoria, IL. 7 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 309-232-4xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.