Hi groupies

Is it possible to use an Advanced Filter to filter cells by their formatting.

For example. If I have a list of customers, some from the States some from
Canada and some from Europe, I would like to be able to filter by the format
of the data in the PostalCode/ZipCode field.

Canadian Postal Codes are L9L 9L9 format, US being 99999-9999 etc.

Any ideas?
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Thanks for the brainwaves!

CJ
I blame the parents........