About this number
(312) 256-8737 is a landline based telephone number operated by Cimco Communications, Inc. - I and is located in zip code 60603 in the city of Chicago, Illinois, which is in Cook County, and is in the Midwest. It has a Number Planning Area (NPA - also known as an Area Code) of 312, a Network Numbering Exchange (NXX - also known as a prefix) of 256 and a subscriber number of 8737. It has an Operating Company Number (OCN) of 5917. A Common Language Location Identifier (CLLI) of NOCLLIKNOWN. As well as a Local access and transport area (LATA) of 358. It was first assigned for usage on 01/02/2009. Zip code 60603 has a population of 493 as of the 2010 census.