← Area code 309
309-574 phone numbers
Numbers 309-574-0000 to 309-574-9999 are assigned to Verizon Wireless in Aledo, IL. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 309-574-2xxx, 309-574-4xxx, 309-574-5xxx, 309-574-6xxx, 309-574-7xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.