About this number
(605) 854 is a landline based telephone number operated by Qwest Corporation and is located in zip code 57231 in the city of De Smet, South Dakota, which is in Kingsbury County, and is in the Midwest. It has a Number Planning Area (NPA - also known as an Area Code) of 605 and Network Numbering Exchange (NXX - also known as a prefix) of 854. It has an Operating Company Number (OCN) of 9631. A Common Language Location Identifier (CLLI) of DESMSDCORS1. As well as a Local access and transport area (LATA) of 640. Zip code 57231 has a population of 1,695 as of the 2010 census.