Editing Northbrook, Illinois (section)

== Area codes ==
From 1947 until 1988, Northbrook used a single area code, [[Area code 312|312]].<ref>{{Cite web |title=Area Code 312 - Details, official location, official service date, history and time zone |url=https://www.areacodehelp.com/where/area_code_312.shtml}}</ref> However, in 1988, the 312 area code was made exclusive to [[Chicago]] and the [[Area codes 708 and 464|708]] area code was introduced.<ref>{{Cite web |title=Area Code 708 - Details, official location, official service date, history and time zone |url=https://www.areacodehelp.com/where/area_code_708.shtml}}</ref> Then, in 1996, the 708 area code was split into three: [[Area codes 708 and 464|708]], [[Area codes 630 and 331|630]], and [[Area codes 847 and 224|847]].<ref>{{Cite web |title=Area Code 847 - Details, official location, official service date, history and time zone |url=https://www.areacodehelp.com/where/area_code_847.shtml}}</ref> Currently, Northbrook uses the 847 area code as well as the [[Area codes 847 and 224|224]] area code<ref>{{Cite web |title=Northrbook Illinois Area Codes - Area Codes in Northbrook IL |url=https://www.areacodehelp.com/ilcode/northbrook_area_code.shtml}}</ref> which was introduced in 2002.<ref>{{Cite web |title=Area Code 224 - Details, official location, official service date, history and time zone |url=https://www.areacodehelp.com/where/area_code_224.shtml}}</ref>