US United States Major Regions Postal Code Details
๐๏ธ Rock Island ยท Illinois
61232
Andalusia
61244
Babcock
61236
Barstow
61237
Buffalo Prairie
61275
Byron Hills
61244
Campbells Island
61239
Carbon Cliff
61240
Coal Valley
61275
Coe
61242
Cordova
61244
East Moline
61256
Hampton
61257
Hillsdale
61259
Illinois City
61279
Marston
61244
Meersman
61244
Merry Oaks
61264
Milan
61275
Mobet Meadows
61266
Moline
61264
Oak Grove
61279
Perryton
61275
Port Byron
61278
Rapids City
61279
Reynolds
61204
Rock Island
61299
Rock Island Arsonal
61282
Silvis
61244
South Moline
61284
Taylor Ridge
61244
Watertown
61244
Whites Addition
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).