← Area code 573
573-750 phone numbers
Numbers 573-750-0000 to 573-750-9999 are assigned to Level 3 Communications, LLC in Eugene, MO. 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 573-750-0xxx, 573-750-1xxx, 573-750-2xxx, 573-750-3xxx, 573-750-5xxx, 573-750-6xxx, 573-750-8xxx, 573-750-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.