Area Code 519-666 located in LONDON, , ON, more detail is as below. Place NPA (Numbering Plan Area) : 519 NXX (Local Number Prefix) : 666 City : LONDON 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 : 0 ZIP Code : N6A 4B5 Other Information NPANXX : 519666 County Population : 10050 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Coverage Area Name : ILDERTON Latitude : 43.0846 Longitude : -81.3860 ‹ previous : 519-666 next › : 519-666 Telephone Number List 519-666-0000 ~ 519-666-9999