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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})$.
Address verification. Ensure only accurate, deliverable addresses enter your database. How address verification works. Our address validation software appends ZIP + 4Â® data -- prompting users to correct incomplete address details, resolving spelling and formatting errors in real time and enhancing database records on demand.