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There are times when you may want to use the 9 digit zip code validation for US. The 9 digit zip code is usually in format like this #####-####. For a 9 digit US zip code validation use below regular Expression. ^([0-9]{5}-[0-9]{4})$.
USPS CASS Certifiedâ¢ address verification and correction as well as Canadian address verification is available with our APIs. frameworks Canada is SERP Certified address correction and validation software for Canada.