About this number
(406) 217 is a landline based telephone number operated by At&T Local and is located in zip code 59405 in the city of Great Falls, Montana, which is in Cascade County, and is in the West. It has a Number Planning Area (NPA - also known as an Area Code) of 406 and Network Numbering Exchange (NXX - also known as a prefix) of 217. It has an Operating Company Number (OCN) of 7421. A Common Language Location Identifier (CLLI) of GRFLMTAG3MD. As well as a Local access and transport area (LATA) of 648. Zip code 59405 has a population of 31,438 as of the 2010 census.