← Area code 620
620-533 phone numbers
Numbers 620-533-0000 to 620-533-9999 are assigned to Nex-Tech Wireless, LLC (rate centre LITTLE RIV, KS, NANPA abbreviation). 1 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 620-533-1xxx, 620-533-2xxx, 620-533-3xxx, 620-533-4xxx, 620-533-6xxx, 620-533-7xxx, 620-533-8xxx, 620-533-9xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.