Area Code 920-266 located in FOND DU LAC, FOND DU LAC, WI, more detail is as below. Place NPA (Numbering Plan Area) : 920 NXX (Local Number Prefix) : 266 City : FOND DU LAC County : FOND DU LAC State : WI (Wisconsin) NXX Use Type : Landline NXX Intro Version : 2001-06-30 FIPS (Federal Information Processing Standards) : 55039 LATA (Local Access Transport Area) : 356 Rate Center : FONDDU LAC ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 54937 Other Information NPANXX : 920266 Switch CLLI (Common Language Location Identifier) : FDULWI01DS0 MSA CBSA (Core Based Statistical Area) : Fond du Lac, WI MSA CBSA Code (Core Based Statistical Area) : 22540 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : AMERITECH WISCONSIN OCN (Operating Company Number) : 9327 Coverage Area Name : FOND DU LAC Latitude : 43.7782 Longitude : -88.4480 ‹ previous : 920-265 next › : 920-267 Telephone Number List 920-266-0000 ~ 920-266-9999