About this number
(423) 543 is a landline based telephone number operated by United Telephone-Southeast-Tn and is located in zip code 37643 in the city of Elizabethton, Tennessee, which is in Carter County, and is in the South. It has a Number Planning Area (NPA - also known as an Area Code) of 423 and Network Numbering Exchange (NXX - also known as a prefix) of 543. It has an Operating Company Number (OCN) of 4510. A Common Language Location Identifier (CLLI) of ELTNTNXADS0. As well as a Local access and transport area (LATA) of 956. Zip code 37643 has a population of 33,689 as of the 2010 census.