← Area code 531
531-264 phone numbers
Numbers 531-264-0000 to 531-264-9999 are assigned to Bandwidth.com CLEC, LLC in Firth, NE. 3 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 531-264-4xxx, 531-264-5xxx, 531-264-6xxx, 531-264-7xxx, 531-264-8xxx, 531-264-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.