About this number
(605) 388 is a landline based telephone number operated by Qwest Corporation and is located in zip code 57701 in the city of Rapid City, South Dakota, which is in Pennington 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 388. It has an Operating Company Number (OCN) of 9631. A Common Language Location Identifier (CLLI) of RPCYSDCODS1. As well as a Local access and transport area (LATA) of 640. Zip code 57701 has a population of 43,462 as of the 2010 census.