← Area code 423
423-231 phone numbers
Numbers 423-231-0000 to 423-231-9999 are assigned to New Cingular Wireless PCS, LLC in Morristown, TN.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.
Numbers 423-231-0000 to 423-231-9999 are assigned to New Cingular Wireless PCS, LLC in Morristown, TN.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.