US United States Major Regions Postal Code Details
๐๏ธ Iroquois ยท Illinois
60911
Ashkum
60912
Beaverville
60918
Buckley
60922
Chebanse
60924
Cissna Park
60926
Claytonville
60927
Clifton
60928
Crescent City
60930
Danforth
60931
Donovan
60938
Gilman
60939
Goodwine
60945
Iroquois
60948
Loda
60951
Martinton
60953
Milford
60955
Onarga
60956
Papineau
60922
Sammons Point
60966
Sheldon
60967
Stockland
60968
Thawville
60970
Watseka
60973
Wellington
60974
Woodland
๐ฎUS United States Regional Postal Code FAQ & Postal Regulations
๐ฎ What is the format of a US ZIP code?
Standard format is 5 digits (e.g., 10001). Extended format is ZIP+4 (9 digits like 10001-1234) with a hyphen.
๐ How to find the ZIP code for an address?
Use the USPS ZIP Code Lookup tool by entering the full address on the official USPS website.
โ ๏ธ What happens if I use a wrong ZIP code?
Mail may be delayed, returned, or lost. For important documents, use USPS tracking and verify the ZIP code.
๐ Do ZIP codes ever change?
Yes, USPS may update ZIP codes due to regional adjustments. Always confirm your ZIP code after an address change.
๐ฆ Is a ZIP code required for international mail to the US?
Absolutely. Always include the US ZIP code at the end of the address (e.g., New York, NY 10001 USA).