← Area code 423
423-552 phone numbers
Numbers 423-552-0000 to 423-552-9999 are assigned to Verizon Wireless (rate centre GREENEVL, TN, NANPA abbreviation). 3 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.