About this number
(231) 821 is a landline based telephone number operated by Frontier North, Inc. - Mi and is located in zip code 49425 in the city of Holton, Michigan, which is in Muskegon County, and is in the Midwest. It has a Number Planning Area (NPA - also known as an Area Code) of 231 and Network Numbering Exchange (NXX - also known as a prefix) of 821. It has an Operating Company Number (OCN) of 695. A Common Language Location Identifier (CLLI) of HLTNMIXGRS0. As well as a Local access and transport area (LATA) of 348. Zip code 49425 has a population of 3,660 as of the 2010 census.