Val-d'Or, QC is using an area code overlay in which area codes 819 and 873 serve the same geographic area. Area code 819 was created from a split of area code 514 in 1957. The area code overlay was established on 09/15/2012 when area code 873 was put into service. Ten digit dialing (area code + seven digit number) is necessary because two different homes in the same geographic area can have the same seven digit phone number but each would have a different area code.
In addition to Val-d'Or, QC area codes 819 and 873 covers portions of central and western Quebec including the communities of Drummondville, Gatineau, Magog, Rouyn-Noranda, Shawinigan, Sherbrooke, Trois-Rivières, Val-d'Or, and Victoriaville in addition to many smaller communities within the service area.