← Area code 309
309-474 phone numbers
Numbers 309-474-0000 to 309-474-9999 are assigned to Onvoy, LLC in Varna, IL. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 309-474-0xxx, 309-474-3xxx, 309-474-5xxx, 309-474-6xxx, 309-474-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.