Check a recent utility bill, bank statement, or official mail
Look up your address on the USPS ZIP Code Lookup tool
Search your full address in an online map or address lookup service
Ask your local post office for your ZIP+4 code
Use your city, street, and house number to verify the exact ZIP code
Check package labels or shipping addresses sent to your home
Contact your landlord, building manager, or local government office
Review any address forms you have already filled out
Use the ZIP code finder on your mail carrier’s website
Confirm the ZIP+4 with USPS if you need the full code