Area codes 819, 873, and 468 are overlay telephone area codes in the North American Numbering Plan (NANP) for central and western Quebec, Canada, including the Quebec portion of the National Capital Region, and the Hudson Strait and Ungava Bay coastlines of Quebec. Major cities in the territory include Gatineau, Sherbrooke, Trois-Rivières, Drummondville, Shawinigan, Victoriaville, Rouyn-Noranda, Val-d'Or, Magog and Mont-Laurier.

Magog is a city in southeastern Quebec, Canada, about 120 kilometres (75 mi) east of Montreal at the confluence of Lake Memphremagog—after which the city was named—with the Rivière aux Cerises and the Magog River. It is a major centre and industrial city in the Regional County Municipality of Memphremagog. The city lies in the Eastern Townships tourist region.