If you think we have more than enough area codes in the Greater Toronto Area, you're sadly mistaken.

Starting March 25, two new area codes will be introduced in the GTA. In Toronto the 437 area code will be added to the already existing 416 and 647 ones, while the 365 area code will be added to the 905/289 region.

The new area codes are being added due to increasing demand for telephone numbers, especially wireless devices, that have created the need for additional numbers to serve customers in these regions.

The Canadian Numbering Administrator says new 437 and 365 area codes will provide additional telephone numbers with no impact on existing telephone numbers. The new area codes will coexist with the current ones and will come into effect as new telephone numbers are introduced.

"These new area codes reflect the growing use of cell phones and other mobile devices. Telecommunications service providers will be able to accommodate the growing demand for new telephone numbers with absolutely no impact on customers," said  Glenn Pilley, Director of the Canadian Numbering Administrator.
"We expect the first numbers with the new area codes to be assigned over the coming months as part of a seamless transition process."

The introduction of the new area codes will not affect the local calling areas or the way local or long distance calls are dialed. Special numbers like 9-1-1 will still be dialed using only three digits.