Enter three digits in the from and to fields, and click Search to see a list of Post Offices in our database in that range. The list will include the establishment date where research is complete on an office and the discontinuance date, if applicable.
Important: ZIP Codes recorded in this database may no longer be current. To look up a current ZIP Code, visit Look up a ZIP Code.
Remember! Many discontinued Post Offices are not listed. See the FAQs about Postmaster Finder.
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