← Area code 606
606-635 phone numbers
Numbers 606-635-0000 to 606-635-9999 are assigned to Powertel Kentucky Licenses, Inc. (rate centre PRESTONSBG, KY, NANPA abbreviation). 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 606-635-1xxx, 606-635-2xxx, 606-635-3xxx, 606-635-4xxx, 606-635-6xxx, 606-635-7xxx, 606-635-8xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.