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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. Address Information System (AIS) Viewer | PostalPro - USPS

    2 days ago · Address Lookup – Lookup individual addresses to verify/obtain the correct 5-digit ZIP Code, ZIP + 4 code, carrier route code, county code, delivery point code, and check digit code.

  3. Welcome | USPS

    Welcome to USPS.com. Track packages, pay and print postage with Click-N-Ship, schedule free package pickups, look up ZIP Codes, calculate postage prices, and find everything you need …

  4. Look Up a ZIP Code™ | PostalPro - USPS

    ZIP Code by Address Enter street address, city, and state to see a specific ZIP Code. Note: A ZIP Code result does not confirm that a person or company is at that address.

  5. 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.

  6. Search Results | address lookup - USPS

    Find answers to common USPS questions, including address lookups, ZIP Code™ searches, and mailing tips.

  7. Check the Addresses | Postal Explorer

    To make sure that you are getting a list with accurate addresses, ask about the National Deliverability Index (NDI) of the list. The NDI rates the percentage of addresses in a list that …

  8. USPS.com

    Skip Business Links Business Skip International Links International Skip Help Links Help Skip Search Search USPS.com

  9. USPS - Address Management

    Explore the many ways you can efficiently manage and process your address lists.

  10. Delivery Address | Postal Explorer

    Use the free ZIP Code Lookup and the ZIP+4 code lookup on the Postal Explorer website (left frame) to find the correct ZIP Codes and ZIP+4 codes for your addresses. Almost 25% of all …