← Area code 309
309-910 phone numbers
Numbers 309-910-0000 to 309-910-9999 are assigned to Onvoy, LLC in Edgington, IL. 4 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 309-910-3xxx, 309-910-4xxx, 309-910-5xxx, 309-910-6xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.