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Ontario is currently using nine area codes. Ontario is utilizing three area code overlay plans, often called overlay
complexes. Ontario currently has two area codes, 249 and 343, which have been assigned to provide numbering relief but are not yet in service.
Ontario originally had two area codes when the numbering
system was established in 1947. By 1953 Ontario experienced sufficient growth in population and telephone use to need an additional area codes. To meet this increase in demand the two original area codes 416
and 613, established in 1947, were split to form area code 519. Four years later in 1957 area codes 613 and 519 were split to form area code 705. These changes resulted in four area codes being utilized in
Ontario by 1957. In 1962 area code 705 was split to establish area code 807.
These five area codes were sufficient for more than 31 years when in 1993 area code 416 was split to form area code 905.
Between 2001 and 2006 three more area codes were established and put into service. These changes resulted in the nine area codes in use today.
Changes and History of Ontario Area Codes:
01/01/1947
Area code 416 was put into service. In 1953 area code 416, along with area code 613, was split to form area code 519. In 1993 area code 416 was split to form area code 905. In 2001 area code
416 was overlaid with area code 647.
01/01/1947
Area code 613 was put into service. In 1953 area code 613, along with area code 416, was split to form area code 519. In 1957 area code 613, along
with area code 519, was split to form area code 705. Area code 343 is proposed as an area code overlay of area code 613 effective 05/17/2010.01/01/1953
Area code 519 was put into service.
Area code 519 was created from a split of area codes 416 and 613. In 1957 area code 519, along with area code 613, was split to form area code 705. In 2006 area code 519 was overlaid with area code 226.
01/01/1957
Area code 705 was put into service. Area code 705 was created from a split of area codes 613 and 519. In 1962 area code 705 was split to form area code 807. Area code 249 is proposed as an
area code overlay of area code 705 effective 03/19/2011.
01/01/1962
Area code 807 was put into service. Area code 807 was created from a split of area code 705.
10/04/1993
Area code 905
was put into service. Area code 905 was created from a split of area code 416. In 2001 area code 905 was overlaid with area code 289.
03/05/2001
Area code 647 was put into service. Area code 647 is
an overlay of area code 416.
06/09/2001
Area code 289 was put into service. Area code 289 is an overlay of area code 905.
10/21/2006
Area code 226 was put into service. Area code 226 is
an overlay of area code 519.
not in service
Area code 343 was put into service. Area code 343 is proposed as an overlay of area code 613 but is not yet in service. The implementation date is
scheduled for 05/17/2010.
not in service
Area code 249 was put into service. Area code 249 is proposed as an overlay of area code 705 but is not yet in service. The implementation date is scheduled
for 03/19/2011. |
