Facts about Canadian Postal Codes

Postal codes in Canada are alphanumeric. Most of the counties in the world use numeric-only postal codes. Besides Canada, only UK, Brunei, Malta and Holland have letters in their postal codes.
Format of postal code in Canada is A9A 9A9.
You can tell the province, postal code belongs to by looking at the first letter of the postal code.
Only Ontario and Quebec use more than one first letter for their postal codes.
First digit in the postal code (right after first letter) can be used identify type of the area it covers. 0 for rural and any other digit for urban.
H0H 0H0 is the official postal code of Santa Claus, North Pole.
Canadian postal code never include letters D, F, I, O, Q, or U as they might confuse electronic equipment, used to automatically recognizing the postal codes.
According to Statistics Canada, the most populated FSA (first three characters of the postal code) is JOK (Joliette rural) with populaton of 135,850.
There are also 10 FSAs with population of exactly zero.