Area codes 519, 226, 548, and 382

Area codes 519, 226, 548, and 382 are telephone overlay area codes in the North American Numbering Plan (NANP) for most of southwestern Ontario.

Area code 519 was the initial code of the numbering plan area (NPA), an area that was established in 1953 in a remapping of the previous numbering plan areas in the region, namely the western portion of 416 and the southwestern portion of 613. The new numbering plan area was mostly bounded by area code 905, except for Simcoe County which is neighboring 705. Area code 226 was added to the numbering plan area in 2006 in a conversion to an overlay numbering plan. Area codes 548 and 382 were added to this area in 2015 and 2023, respectively.

The primary incumbent local exchange carrier (ILEC) in the overlay complex is Bell Canada, with numerous other small independent companies that covered vast tracts of rural Ontario. Since competition for service was mandated in 1997, numerous competitive local exchange carriers (CLECs) have also started serving the region.

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