Area Code 306-231 located in HUMBOLDT, , SK, more detail is as below. Place NPA (Numbering Plan Area) : 306 NXX (Local Number Prefix) : 231 City : HUMBOLDT State : SK (Saskatchewan) NXX Use Type : Landline NXX Intro Version : 1994-02-04 LATA (Local Access Transport Area) : 891 ZIP Code Count : 0 ZIP Code Frequency : 50 ZIP Code : S0K 2A0 Other Information NPANXX : 306231 County Population : 80672 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : No Coverage Area Name : HUMBOLDT Latitude : 52.2005 Longitude : -105.1203 ‹ previous : 306-230 next › : 306-231 Telephone Number List 306-231-0000 ~ 306-231-9999