About this number
(309) 457 is a landline based telephone number operated by Citizens Telecom Co Illinois-F and is located in zip code 61462 in the city of Monmouth, Illinois, which is in Warren County, and is in the Midwest. It has a Number Planning Area (NPA - also known as an Area Code) of 309 and Network Numbering Exchange (NXX - also known as a prefix) of 457. It has an Operating Company Number (OCN) of 1183. A Common Language Location Identifier (CLLI) of MNMOILXDDS0. As well as a Local access and transport area (LATA) of 977. Zip code 61462 has a population of 11,643 as of the 2010 census.