← Area code 309
309-447 phone numbers
Numbers 309-447-0000 to 309-447-9999 are assigned to Frontier Communications of the Carolinas, Inc in Deer Creek, IL. 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 309-447-2xxx, 309-447-3xxx, 309-447-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.