Area Code 905-309 located in GRIMSBY, , ON, more detail is as below. Place NPA (Numbering Plan Area) : 905 NXX (Local Number Prefix) : 309 City : GRIMSBY State : ON (Ontario) NXX Use Type : Landline NXX Intro Version : 1994-09-11 LATA (Local Access Transport Area) : 851 ZIP Code Count : 0 ZIP Code Frequency : 4 ZIP Code : L3M 5J7 Other Information NPANXX : 905309 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Coverage Area Name : GRIMSBY Latitude : 43.1908 Longitude : -79.5587 ‹ previous : 905-308 next › : 905-309 Telephone Number List 905-309-0000 ~ 905-309-9999