← Area code 309
309-877 phone numbers
Numbers 309-877-0000 to 309-877-9999 are assigned to Terra Nova Telecom Inc. in Peoria, IL. 4 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 309-877-4xxx, 309-877-5xxx, 309-877-6xxx, 309-877-8xxx, 309-877-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.