← Area code 712
712-223 phone numbers
Numbers 712-223-0000 to 712-223-9999 are assigned to New Cingular Wireless PCS, LLC in Sioux City, IA. 3 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.