About this number
(815) 428 is a landline based telephone number operated by Frontier North, Inc. - Il and is located in zip code 60951 in the city of Martinton, Illinois, which is in Iroquois County, and is in the Midwest. It has a Number Planning Area (NPA - also known as an Area Code) of 815 and Network Numbering Exchange (NXX - also known as a prefix) of 428. It has an Operating Company Number (OCN) of 1015. A Common Language Location Identifier (CLLI) of MTTNILXARS0. As well as a Local access and transport area (LATA) of 358. Zip code 60951 has a population of 961 as of the 2010 census.