About this number
(605) 427 is a landline based telephone number operated by Knology Of The Plains, Inc. - and is located in zip code 57042 in the city of Madison, South Dakota, which is in Lake 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 427. It has an Operating Company Number (OCN) of 7024. A Common Language Location Identifier (CLLI) of MDSNSDARDS0. As well as a Local access and transport area (LATA) of 640. Zip code 57042 has a population of 8,415 as of the 2010 census.