Area Code 403-203 located in CALGARY, , AB, more detail is as below. Place NPA (Numbering Plan Area) : 403 NXX (Local Number Prefix) : 203 City : CALGARY State : AB (Alberta) NXX Use Type : Landline NXX Intro Version : 1997-01-11 LATA (Local Access Transport Area) : 884 ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. Other Information NPANXX : 403203 County Population : 32555 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Coverage Area Name : CALGARY Latitude : 51.0478 Longitude : -114.0585 ‹ previous : 403-202 next › : 403-204 Telephone Number List 403-203-0000 ~ 403-203-9999