← Area code 660
660-722 phone numbers
Numbers 660-722-0000 to 660-722-9999 are assigned to Level 3 Communications, LLC in Urich, MO. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 660-722-1xxx, 660-722-3xxx, 660-722-5xxx, 660-722-6xxx, 660-722-7xxx, 660-722-8xxx, 660-722-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.