USPS Address Lookup : Fast, Free Tool

by Alice Scott - Updated Jun 14, 2024

About USPS Address Lookups

Our free USPS Address Lookup tool is quick and easy to use. It helps find missing address information, validates uncertain addresses efficiently, and provides correct addresses.

USPS Address Lookup
Address Line 1
Address Line 2

How to Use the USPS Address Lookup Tool

1. Input Address Information:

    • Address Line 1
    • Address Line 2 (if applicable)
    • City
    • State
    • 5-digit Zip Code
    • Zip+4 Code (optional)

    2. Click ‘USPS Address Lookup’

    • Enter the street address, city, state, and zip code.
    • Click the orange ‘USPS Address Lookup’ button.

    3. Get Validated Results

    • The tool checks the address against our United States Postal Service approved database.
    • It confirms if the address is a valid address and properly formatted.

    Benefits of Using a USPS Address Lookup Tool

    • Ensure Deliverability: Verify addresses are accurate and correctly formatted.
    • Save Time and Money: Avoid undeliverable mail and reduce return costs.
    • Increase Efficiency: Ensure prompt delivery of mail and packages.
    USPS Address Lookup Tool is fast and free.
    USPS Address Lookup Tool is fast and free !

    Verifying PO Box Addresses

    Yes, our tool can verify PO Box addresses.

    Finding Correct Zip Codes

    Use our tool to quickly find and validate the correct zip code for an address by entering the street address, city, and state, then clicking "USPS Address Lookup". Or you can you use a different tool, like the free tool on the USPS website:

    Common Reasons for USPS Address Lookups

    • Zip Code Lookup: For incomplete addresses missing a zip code.
    • Change of Address: When someone has recently moved and you need their new address.
    • Address Lookup by Name: Find a mailing address using a person’s name.
    • Lookup by Address: Find the name of the person or people living at an address.

    Correct USPS Approved Address Format

    Residential Address:

    • First and Last Name
    • Street Number + Street Name, Building Number / Apartment #
    • City, State, Zip Code

    Company Address:

    • Contact Name & Title (if applicable)
    • Company Name
    • Street Number + Street Name, Building Number / Suite Number
    • City, State, Postal Code

    You can read more about the recommended delivery address format on the USPS website.

    USPS Approved Delivery Address Format
    USPS Approved Address format for direct mail.

    Verifying an Address with the Post Office

    Use our tool or the free address lookup service & address validation tool on the USPS website. Enter the postal address and click ‘Find’ for quick, simple, and free address search & validation.

    Cost of Address Verification

    Single address verification is free. However, for bulk address verification using our address database, a fee may apply. LeadsPlease offers Address Verification services—contact us for more information and pricing.

    Bulk Address Verification

    Email us your address list in .xls or .csv format. We will update your address data using USPS-approved validation software and return an accurate, updated list. Contact our Customer Support for more information and pricing.

    USPS Change of Address Process

    To receive mail at a new address, update your address with USPS using their official Change-of-Address website. Without updating, mail will not be delivered to the new address.

    People and businesses can update their change of address on the USPS website: Official USPS Change-of-Address

    What is NCOA?

    NCOA (National Change of Address) software updates mailing addresses after a move. LeadsPlease uses NCOA software for accurate address updates.

    USPS Move Update

    Update your mailing list every 95 days to reduce forwarding or return issues. Proof of recent updates and data quality is required for certain USPS pricing options.

    According to the USPS website:

    The Move Update standard is a means of reducing the number of mailpieces in a mailing that require forwarding or return by the periodic matching of a mailer’s address records with change-of-address orders received and maintained by the Postal Service™. 

    USPS Move Update

    Need a Direct Mailing List?

    LeadsPlease offers targeted Consumer and Business Mailing Lists with up-to-date, high-quality data for successful direct mailing campaigns.

    Address Validation API

    Yes, we offer an address validation API. Contact us for more information and pricing.

    Other Helpful Resources



    USPS Address Lookup FAQs

    What is CASS?

    CASS stands for Coding Accuracy Support System. It is a certification process maintained by the USPS. It evaluates the quality of addresses.

    What is Delivery Point Validation or DPV?

    DPV confirms if an address is real, accurate and deliverable.

    Can you help me verify many addresses at one time?

    Yes! If you want to verify the address information for lots of addresses in an address list, you will most likely need to pay a company to help you.

    LeadsPlease offers Address Validation services. Please Contact Us for more information and pricing.

    Does your tool work with international addresses?

    No, sorry. At this time, the tool works only with USA mailing addresses.

    Does yourprovide an accurate house number?



Can we help you?

Call us on 866 306 8674

for free expert assistance.