← Area code 309
309-618 phone numbers
Numbers 309-618-0000 to 309-618-9999 are assigned to Onvoy Spectrum, LLC in Galva, IL. 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 309-618-0xxx, 309-618-1xxx, 309-618-2xxx, 309-618-3xxx, 309-618-4xxx, 309-618-5xxx, 309-618-6xxx, 309-618-7xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.