High Quality Content by WIKIPEDIA articles! A Canadian postal code is a six-character string that forms part of a postal address in Canada. Like British and Dutch postcodes, Canada`s postal codes are alphanumeric. They are in the format A0A 0A0, where A is a letter and 0 is a digit, with a space separating the third and fourth characters. According to Statistics Canada, about 850,000 postal codes exist in Canada, using Forward Sortation Areas from A0A in Newfoundland to Y1A in Yukon.