← Area code 309
309-602 phone numbers
Numbers 309-602-0000 to 309-602-9999 are assigned to Onvoy, LLC in Sherrard, IL. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 309-602-3xxx, 309-602-4xxx, 309-602-5xxx, 309-602-8xxx, 309-602-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.