309-744 phone numbers

Numbers 309-744-0000 to 309-744-9999 are assigned to Frontier Communications of the Carolinas, Inc in Secor, IL. 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 309-744-3xxx, 309-744-8xxx, 309-744-9xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 309-744