About this number
(847) 637 is a landline based telephone number operated by At&T Local and is located in zip code 60523 in the city of Oak Brook, Illinois, which is in Dupage County, and is in the Midwest. It has a Number Planning Area (NPA - also known as an Area Code) of 847 and Network Numbering Exchange (NXX - also known as a prefix) of 637. It has an Operating Company Number (OCN) of 7421. A Common Language Location Identifier (CLLI) of OKBRILOAIMD. As well as a Local access and transport area (LATA) of 358. Zip code 60523 has a population of 9,890 as of the 2010 census.