US United States Major Regions Postal Code Details
🏛️ Vilas · Wisconsin
54512
Boulder Junction
54521
Clearwater Lake
54521
Cloverland
54519
Conover
54521
Eagle River
54538
Lac Du Flambeau
54540
Land O Lakes
54545
Manitowish Waters
54554
Phelps
54560
Plum Lake
54557
Presque Isle
54558
Saint Germain
54560
Sayner
54561
Star Lake
54521
Washington
54557
Winchester
📮US United States Regional Postal Code FAQ & Postal Regulations
📮 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.
🔍 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.
⚠️ 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.
🔄 Do ZIP codes ever change?
Yes, USPS may update ZIP codes due to regional adjustments. Always confirm your ZIP code after an address change.
📦 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).