ciekawy temat:
US Zip Codes should be 5 digits with no spaces (90210).
US codes include only numbers. Basically, the numbers run from east to west. Therefore, 90210 is obviously on the west coast (Beverly Hills, California) and 10001 will be a part of New York City (east), 60601 will be a part of Chicago (central).
Canadian Postal Codes should be 6 letters/digits and contain a space (N2A 2H2).
The first letter of the code also runs from the eastern part of Canada to the western part (like in the States). Montreal's postal codes would begin with an "H" (east), Toronto's codes would begin with a "M" (central) and Vancouver's (west) codes would begin with a V