US United States Major Regions Postal Code Details
๐๏ธ Clark ยท Illinois
62441
Albright
62420
Casey
62441
Clark Center
62441
Clarksville
62442
Cleone
62423
Dennison
62441
Marshall
62442
Martinsville
62442
Moonshine
62442
Neadmore
62441
Oliver
62474
Parker
62477
West Union
62474
Westfield
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).