That's US-only though. The OP said that wouldn't be enough.

In general you're not going to be able to solve this problem. There are an awful lot of different address formats (eg compare the US, France and Japan), and there can even be different formats within a single country. Additionally, even if you could find a set of rules for each country, I know full well that the rules you'll get for the UK will be wrong, in that while they might specify what the post office *want* people to use, they will not be anything like what people *actually* use, and which *work*.

And finally, don't even consider relying on a database lookup. There are plenty of addresses in the UK which the post office's database gets wrong, or which aren't even in the database. I live at one such address, and it's very annoying when programmers who really should know better are stupid enough to trust a database generated by a government body!

In reply to Re^2: validate a postal code by DrHyde
in thread validate a postal code by powerhouse

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