Area Code 289-333 located in UNIONVILLE, , ON, more detail is as below. Place NPA (Numbering Plan Area) : 289 NXX (Local Number Prefix) : 333 City : UNIONVILLE State : ON (Ontario) NXX Use Type : Landline NXX Intro Version : 2006-06-01 LATA (Local Access Transport Area) : 851 ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. Other Information NPANXX : 289333 County Population : 62393 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Coverage Area Name : UNIONVILLE Latitude : 43.8432 Longitude : -79.2982 ‹ previous : 289-331 next › : 289-360 Telephone Number List 289-333-0000 ~ 289-333-9999