309-579 phone numbers

Numbers 309-579-0000 to 309-579-9999 are assigned to Frontier North, Inc. in Mossville, IL. 6 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 309-579-7xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 309-579