Canadian postal codes can be found on the Canadian Post's official website using their postal code search engine. Simply enter a Canadian address, select an address from the list of suggested address, and obtain the postal code from the formatted address given.
The website also provides a reverse service to find address information within a specific postal code. After finding a postal code, users can print shipping labels or address labels. Searching for postal codes in this manner is limited for business usage under Canadian Post's terms and conditions.
canadapostalcode.net is an alternative that offers Canadian postal code searching by address.