About this number
(406) 430 is a landline based telephone number operated by Onvoy, Inc. - Mt and is located in zip code 59601 in the city of Helena, Montana, which is in Lewis And Clark 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 430. It has an Operating Company Number (OCN) of 715G. A Common Language Location Identifier (CLLI) of HLNAMTBH1MD. As well as a Local access and transport area (LATA) of 648. Zip code 59601 has a population of 29,283 as of the 2010 census.