About this number
(406) 428 is a landline based telephone number operated by Mid-Rivers Telephone Cooperati and is located in zip code 59032 in the city of Grass Range, Montana, which is in Fergus 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 428. It has an Operating Company Number (OCN) of 2246. A Common Language Location Identifier (CLLI) of GRRNMTXCRS1. As well as a Local access and transport area (LATA) of 650. Zip code 59032 has a population of 408 as of the 2010 census.