About this number
(920) 921 is a landline based telephone number operated by Ameritech Wisconsin and is located in zip code 54935 in the city of Fond Du Lac, Wisconsin, which is in Fond Du Lac County, and is in the Midwest. It has a Number Planning Area (NPA - also known as an Area Code) of 920 and Network Numbering Exchange (NXX - also known as a prefix) of 921. It has an Operating Company Number (OCN) of 9327. A Common Language Location Identifier (CLLI) of FDULWI01DS0. As well as a Local access and transport area (LATA) of 356. Zip code 54935 has a population of 41,651 as of the 2010 census.