We’re going to be seeing new area codes on our call displays in the GTA..

Toronto will add 437 to its existing 416 and 647 Monday (March 25) , while 365 will join 905 and 289 in serving a region that stretches from just outside the city to the Golden Horseshoe.

The new codes push the country’s tally to 29, up from the original nine established in 1947.