← Area code 573
573-973 phone numbers
Numbers 573-973-0000 to 573-973-9999 are assigned to Onvoy, LLC in Eolia, MO. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 573-973-0xxx, 573-973-4xxx, 573-973-5xxx, 573-973-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.