Starting January 15, 2011 you will have to dial the area code plus the phone number for the 705 area code. Remember to update your contacts information in your cell phones. If you call with out the 705 you will get a message reminding you to use the area code and then you will be connected. This transition service will last until March 5, 2011.
And starting March 19, 2011 there will be a new area code added to this region as well. New activations will be given 249.
For more information go to http://www.dial10.ca