About this number
(406) 437 is a landline based telephone number operated by McImetro Access Transmission s and is located in the city of Helena, Montana 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 437. It has an Operating Company Number (OCN) of 7229. A Common Language Location Identifier (CLLI) of HLNAMTMAMMD. As well as a Local access and transport area (LATA) of 648. It was first assigned for usage on 07/27/2004.