About this number
(231) 237 is a landline based telephone number operated by Ameritech Michigan and is located in zip code 49720 in the city of Charlevoix, Michigan, which is in Charlevoix 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 237. It has an Operating Company Number (OCN) of 9323. A Common Language Location Identifier (CLLI) of CHVXMIMNRS0. As well as a Local access and transport area (LATA) of 348. Zip code 49720 has a population of 9,172 as of the 2010 census.