Area Code 403-204 located in CALGARY, , AB, more detail is as below. Place NPA (Numbering Plan Area) : 403 NXX (Local Number Prefix) : 204 City : CALGARY State : AB (Alberta) NXX Use Type : Landline NXX Intro Version : 1998-11-20 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 : 403204 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 : 403-203 next › : 403-205 Telephone Number List 403-204-0000 ~ 403-204-9999