About this number
(815) 401 is a landline based telephone number operated by Level 3 Communications, LLC - and is located in zip code 60606 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 815 and Network Numbering Exchange (NXX - also known as a prefix) of 401. It has an Operating Company Number (OCN) of 6115. A Common Language Location Identifier (CLLI) of CHCGILGMDS7. As well as a Local access and transport area (LATA) of 358. Zip code 60606 has a population of 2,308 as of the 2010 census.