<P> Area code 613 and overlay area code 343 are area codes for Ottawa and surrounding Eastern Ontario, Canada, in the North American Numbering Plan (NANP). 613 is one of the 86 original area codes in the NANP assigned in October 1947 . </P> <P> The 613 area originally covered all of Ontario with the exception of the Golden Horseshoe, which was in area code 416 . The area code has been split twice . In 1953, the Southwestern Ontario portion of 613 was combined with the western portion of 416 to become 519 . In 1957 the vast northwestern portion of 613 was combined with the northern portion of 519 to become area code 705 . Since 1957, 613 covers only Eastern Ontario, an area extending from Brighton and Deep River eastward to Saint Regis, Quebec . </P>

Where does the area code 613 come from