← Area code 620
620-401 phone numbers
Numbers 620-401-0000 to 620-401-9999 are assigned to New Cingular Wireless PCS, LLC in Leoti, KS.
Not assigned to any carrier: 620-401-0xxx, 620-401-1xxx, 620-401-2xxx, 620-401-3xxx, 620-401-4xxx, 620-401-5xxx, 620-401-6xxx, 620-401-7xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.