About this number
(773) 990 is a landline based telephone number operated by Ameritech Illinois and is located in zip code 60631 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 773 and Network Numbering Exchange (NXX - also known as a prefix) of 990. It has an Operating Company Number (OCN) of 9329. A Common Language Location Identifier (CLLI) of CHCGILNEDS0. As well as a Local access and transport area (LATA) of 358. It was first assigned for usage on 03/20/2006. Zip code 60631 has a population of 28,641 as of the 2010 census.