How to Search Postal / Zip Code (Start Here)
Use the databases below to search postal / zip code. These are federal and nationwide sources. For state or county-level records, go to the specific state page.
⚠ Federal databases only cover federal-level data. State and county records require separate searches at the appropriate level.
SearchSystems.net has tracked federal record systems since 1997.
Use the databases below to search postal / zip code.
Correct an Address
Official Free
This is a handy database that people find quite useful, but many aren't aware that it exists. Enter a United States postal address and this service w
Private Mail Box Addresses
Official Free
Search for private mail box address by street name, city, state, and zip code.
Zip Codes
Official Free
Browse this comprehensive database of zip code information by DownloadZipCode.com to view data including city, state, area code, county, country FIPS,
Frequently Asked Questions
What is the fastest way to search postal / zip code?▼
Start with the primary database listed above. Each system is specialized - use the Returns vs Excludes table to identify which one matches your needs.
Why does my search return no results?▼
Federal databases only cover federal-level data. If you need state or county records, go to the specific state page. Federal and state systems are completely separate.
Is there a single database for all these records?▼
No. Each federal agency maintains its own system independently. You must search the specific agency that handles the record type you need.
Other Federal Databases
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