About this number
(605) 644-0010 is a landline based telephone number operated by Qwest Corporation and is located in zip code 57783 in the city of Spearfish, South Dakota, which is in Lawrence County, and is in the Midwest. It has a Number Planning Area (NPA - also known as an Area Code) of 605, a Network Numbering Exchange (NXX - also known as a prefix) of 644 and a subscriber number of 0010. It has an Operating Company Number (OCN) of 9631. A Common Language Location Identifier (CLLI) of SPRFSDCORS1. As well as a Local access and transport area (LATA) of 640. It was first assigned for usage on 01/01/1901. Zip code 57783 has a population of 14,290 as of the 2010 census.