About this number
(423) 781 is a landline based telephone number operated by At&T Local and is located in zip code 37917 in the city of Knoxville, Tennessee, which is in Knox 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 781. It has an Operating Company Number (OCN) of 7421. A Common Language Location Identifier (CLLI) of KNVLTNMA23Z. As well as a Local access and transport area (LATA) of 474. It was first assigned for usage on 03/01/2004. Zip code 37917 has a population of 24,072 as of the 2010 census.