← Area code 620
620-512 phone numbers
Numbers 620-512-0000 to 620-512-9999 are assigned to Bandwidth.com CLEC, LLC in Oxford, KS. 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 620-512-2xxx, 620-512-3xxx, 620-512-4xxx, 620-512-5xxx, 620-512-6xxx, 620-512-7xxx, 620-512-8xxx, 620-512-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.