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  1. ZIP Code™ Lookup | USPS

    Enter a corporate or residential street address, city, and state to see a specific ZIP Code ™. Find by Address By City and State

  2. Home | United States ZIP Code 5 Plus 4 ️

    Each 9-digit ZIP Code corresponds to one or more addresses within the U.S. territories. Additionally, this site offers several address-related tools, including address validation, full ZIP …

  3. US ZIP Code Database - ZIP Code List, Data & Download

    6 days ago · The ZIP+4 Database contains every U.S. street and address range with its corresponding 9-digit ZIP Code, providing the most granular level of postal code data available.

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    • ZIP+4 Lookup Tool (USPS-Powered 9-Digit ZIP Code Finder)

      Enter a full mailing address to get the correct 9-digit ZIP+4 code and USPS-standardized address format. Free tool powered by official USPS data.

    • Why Do Some ZIP Codes Have 9 Digits? - LegalClarity

      Aug 10, 2025 · In 1983, the USPS introduced an extended version of the ZIP Code, known as ZIP+4, to enhance mail sorting and delivery precision. This system appends four additional …

    • United States ZIP CodesZIP Code Lookup by Address

      ZIP Codes for United States. Use our address lookup or code list to find the correct 5-digit or 9-digit (ZIP+4) code for your postal mails destination.

    • ZIP+4 Code lookup | Get last 4 digits of 9-digit ZIP Codes - Smarty

      Find ZIP+4 Codes for any USPS address. Lookup ZIP+4 Codes by single address, batch, or API. Learn what they are and what they mean too. Use it free.

    • Lookup a U.S. Zip+4 Code - Free Web Tool by Firstlogic

      Our address validation software is able to retrieve the ZIP code of an address based on the Street name and number, City, and State information. If you don't have the ZIP code information for …

    • USPS - Find a ZIP Code

      A ZIP Code is an essential part of the mailing process. We provide your business with several different ways to find a ZIP Code and understand it.

    • How to Find 9 Digit Zip Code: Unlock Accurate Mail Delivery Secrets

      To obtain a 9-digit zip code, users can visit the United States Postal Service (USPS) website. The USPS offers tools and resources, including a zip code lookup feature, which reveals specific …