← Area code 309
309-357 phone numbers
Numbers 309-357-0000 to 309-357-9999 are assigned to Verizon Wireless in Canton, IL. 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 309-357-6xxx, 309-357-7xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.