

Planning Īs the largest Canadian cities grew in the 1950s and 1960s, the volume of mail passing through the country's postal system also grew, to billions of items by the 1950s and tens of billions of items by the mid-1960s. Companies changed their mail addressing at their own expense, only to find the new zoning would prove to be short-lived.
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However, with impending plans for a national postal code system, Postmaster General Eric Kierans announced that the Post Office would begin cancelling the new three-digit city zone system. Toronto's renumbering took effect, accompanied by an advertising campaign under the slogan "Your number is up". For example, an address in Metropolitan Toronto would be addressed as: In the late 1960s, however, the Post Office began implementing a three-digit zone number scheme in major cities to replace existing one- and two-digit zone numbers, starting in Montreal, Toronto and Vancouver.

For example, an address in Vancouver would be addressed as: īy the early 1960s, other cities in Canada had been divided into postal zones, including Quebec, Ottawa, Winnipeg and Vancouver as well as Toronto and Montreal. Postal zones were implemented in Montreal in 1944. Mail to a Toronto address in zone 5 would be addressed in this format:Īs of 1943, Toronto was divided into 14 zones, numbered from 1 to 15, except that 7 and 11 were unused, and there was a 2B zone. Numbered postal zones were first used in Toronto in 1925.
