← Area code 618
618-720 phone numbers
Numbers 618-720-0000 to 618-720-9999 are assigned to Bandwidth.com CLEC, LLC in Pocahontas, IL. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 618-720-2xxx, 618-720-3xxx, 618-720-4xxx, 618-720-5xxx, 618-720-6xxx, 618-720-7xxx, 618-720-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.