Area Code 905-304 located in ANCASTER, , ON, more detail is as below. Place NPA (Numbering Plan Area) : 905 NXX (Local Number Prefix) : 304 City : ANCASTER State : ON (Ontario) NXX Use Type : Landline NXX Intro Version : 1994-02-04 LATA (Local Access Transport Area) : 851 ZIP Code Count : 0 ZIP Code Frequency : 2 ZIP Code : L9K 1J7 Other Information NPANXX : 905304 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Coverage Area Name : ANCASTER Latitude : 43.2266 Longitude : -79.9771 ‹ previous : 905-304 next › : 905-304 Telephone Number List 905-304-0000 ~ 905-304-9999