Stack Exchange network consists of 178 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
There are commercial available canada postal code data as well, they are usually more precise and up to date. Can refer to IGEOCODE postal code products at http://www.igeocode.com/products/capostalcodes/demo/