About this number
(405) 645 is a landline based telephone number operated by Southwestern Bell and is located in zip code 74531 in the city of Calvin, Oklahoma, which is in Hughes County, and is in the South. It has a Number Planning Area (NPA - also known as an Area Code) of 405 and Network Numbering Exchange (NXX - also known as a prefix) of 645. It has an Operating Company Number (OCN) of 9533. A Common Language Location Identifier (CLLI) of CLVNOKMARS1. As well as a Local access and transport area (LATA) of 536. Zip code 74531 has a population of 1,062 as of the 2010 census.