Canadian Postal Codes are only accessible to Standard, Standard-Worldwide, Premium, or Premium-Worldwide users. 

In the PC*MILER database, Canadian cities are stored in the database differently than U.S. cities. Canadian cities are stored and then sorted first by a city name that does not include a Postal Code and then by cities that do have a Postal Code afterwards. 

For example, if you look up Florenceville, NB, the Florenceville, NB, city point is returned, which is the geographic center of that city. If you want to get the Postal Code back for this city, your request needs to have the specific Postal Code as the input.