Find any 579- phone number in Quebec

# The 579 Area Code: Quebec's Overlay Solution

The 579 area code is an overlay that serves the Outaouais region of Quebec, Canada, primarily covering the cities of Gatineau and Hull. Introduced in 2017, the 579 area code shares geographic coverage with the existing 819 area code, meaning both numbers serve the same territory. This overlay system was implemented to address the growing demand for telephone numbers in the region, as the original 819 area code was approaching exhaustion. Residents and businesses in this area can now request either a 579 or 819 number when establishing new telephone service, though existing 819 numbers remain active and unchanged.

The North American Numbering Plan (NANP) designates area codes through a systematic process managed by the North American Numbering Plan Administration (NANPA), which operates under the oversight of the International Telecommunication Union. Area codes are assigned based on geographic regions and population density to ensure adequate telephone numbers are available for growing communities. The 579 overlay exemplifies how the NANP adapts to modern communication needs; rather than reorganizing existing numbers (which would be disruptive), overlay area codes allow multiple codes to serve the same region simultaneously. This approach maintains service continuity while providing the additional numbering capacity necessary to support population growth and the proliferation of devices requiring telephone numbers in the digital age.