Area codes 519, 226, and 548

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

Area code 519 was created in 1953 by a split of two numbering plan areas (NPAs), from the western portion of 416 and the southwestern portion of 613. In 1957, parts of 519 and 613 formed area code 705. 519 is mostly bounded by area code 905, except for Simcoe County which is bordered by 705. It was overlaid with the new area code 226 on October 21, 2006, at which time ten-digit dialling became mandatory. The third area code, 548, was added on June 4, 2015. Area code 382 has been reserved as a fourth code for the region.

The primary ILEC (Incumbent Local Exchange Carrier) in 519/226/548 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 CLECs (Competitive Local Exchange Carrier) have also started serving the region.

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