I agree. Canada uses a concept of FSAs (forward sortation areas) that correspond to regions. I don't think it's safe to rely on truncation under the Canadian po

I agree. Canada uses a concept of FSAs (forward sortation areas) that correspond to regions. I don't think it's safe to rely on truncation under the Canadian postal system. I believe only the first three letters/numbers identify a geographic area, and this is the triple used by politicians and people who need to split up regions of provinces. As you might expect, FSAs are way smaller in major cities than out in rural areas.