618-378 phone numbers

Numbers 618-378-0000 to 618-378-9999 are assigned to Frontier North, Inc. in Norris City, IL. 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 618-378-0xxx, 618-378-1xxx, 618-378-4xxx, 618-378-5xxx, 618-378-7xxx, 618-378-8xxx, 618-378-9xxx — calls from these use spoofed caller IDs.

Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.

Reported numbers in 618-378