Area Code Atlas

NPA 613 assigned as an original area code

Area code 613 was assigned in October 1947 as one of the original North American area codes, covering a large portion of Ontario including Ottawa and eastern regions.

Establishment of area code 519

In 1953, area code 519 was established in southwestern Ontario through a remapping of the western portion of 416 and the southwestern portion of 613. This created a new numbering plan area to serve the region.

NPA 705 created from 613 and 519

Area code 705 was created in 1956 from portions of the 613 and 519 numbering plan areas, serving most of northeastern and central Ontario.

NPA 705 split from 519 and 613

Area code 705 was created in 1957 from parts of 519 and 613, forming a new numbering plan area for central and northeastern Ontario. This split reduced the geographic scope of 519 as northern regions were separated into a distinct numbering plan area.

NPA 613 & NPA 819 Relief Phase One (Dial Plan Change)

NPA 613 & NPA 819 Relief Phase One (Dial Plan Change)

Ten-digit dialing becomes mandatory in 613 and 819

Ten-digit dialing became mandatory in area codes 613 and 819 on October 21, 2006, ending the long-standing seven-digit dialing arrangement between Ottawa and Hull due to number exhaustion and the need for code protection.

Mandatory ten-digit dialing in area codes 819 and 613

Ten-digit dialing became mandatory in area codes 819 and 613 on October 21, 2006, ending the previous seven-digit local dialing and exchange protection between Ottawa and Hull in the National Capital Region.

CRTC approves overlay relief for 613 with NPA 343

On September 10, 2008, the CRTC approved the introduction of area code 343 as an overlay for the 613 region to address projected number exhaustion.

NPA 343 overlay on 613 announced

NPA 343 to Overlay NPA 613 (Eastern Ontario, Canada)

Area code 343 activated as overlay on 613

On May 17, 2010, area code 343 was activated as an overlay on area code 613 in eastern Ontario, including Ottawa. This provided additional numbering resources for the growing population and telecommunications demand in the region, allowing new numbers to be assigned with the 343 code throughout the region.

NPA 753 overlay on 343/613 announced

NPA 753 to Overlay NPA 343/613 (eastern Ontario)

CRTC approves overlay relief for 343/613 with NPA 753

On November 10, 2021, the CRTC approved the introduction of area code 753 as an additional overlay for the 343/613 region to address continued number exhaustion. The Canadian Numbering Administrator approved area code 753 in response to projected number exhaustion, addressing the continued demand for telephone numbers in the region.

NPA 343/613 (eastern Ontario) – amending PL-571

NPA 753 overlay activated

Area code 753 was activated on March 26, 2022, as a second overlay to the 613/343 numbering plan area to address continued number exhaustion.

Area code 871 reserved for future overlay

Area code 871 has been reserved as a fourth area code for the 613/343/753 numbering plan area since May 20, 2025, to provide relief for future number exhaustion.