Can I use M5S 1A1 as the postal code for the whole university, or is that the wrong code?
Canada Post Corporation (CPC) changed its definition of the postal code a few years ago. For various services such as Business Reply Mail they require a unique code for each block or large address. “M5S 1A1” used to be a generic code acceptable for the downtown campus of the U of T, with “1A2” for 215 Huron St., “1A3” for 315 Bloor St. West, “1A4” for Engineering, “1A5” for the Library, “1A6” for the Press, “1A7” for the Physics Building, “1A8” for the Faculty of Medicine, and “1A9” for Woodsworth College. The Press has moved, so “1A6” no longer applies; “1A2”, “1A3”, and “1A9” continue to work as before. As part of the changed definition of the Postal Code, CPC’s revisions to the code directory left many campus addresses without a valid postal code, causing some disruptions to service. Mail would eventually turn up, but the delays were not understood. Therefore CPC consented to put codes in for those addresses that had been left uncoded in the earlier change. M5S 1A1 still gets first
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