Area Code 905-284 located in CONCORD, , ON, more detail is as below. Place NPA (Numbering Plan Area) : 905 NXX (Local Number Prefix) : 284 City : CONCORD State : ON (Ontario) NXX Use Type : Landline NXX Intro Version : 1999-10-13 LATA (Local Access Transport Area) : 851 ZIP Code Count : 0 ZIP Code Frequency : 50 ZIP Code : L4K 3Z6 Other Information NPANXX : 905284 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Coverage Area Name : GORMLEY Latitude : 43.9244 Longitude : -79.3752 ‹ previous : 905-284 next › : 905-285 Telephone Number List 905-284-0000 ~ 905-284-9999