About this number
(331) 281 is a landline based telephone number operated by Ameritech Illinois and is located in zip code 60563 in the city of Naperville, Illinois, which is in Du Page County, and is in the Midwest. It has a Number Planning Area (NPA - also known as an Area Code) of 331 and Network Numbering Exchange (NXX - also known as a prefix) of 281. It has an Operating Company Number (OCN) of 9329. A Common Language Location Identifier (CLLI) of NPVLILNEDS0. As well as a Local access and transport area (LATA) of 358. It was first assigned for usage on 10/25/2012. Zip code 60563 has a population of 35,922 as of the 2010 census.