US United States Major Regions Postal Code Details
๐๏ธ Whiteside ยท Illinois
61230
Albany
61277
Brookhaven
61230
Ceffco
61270
Clyde
61081
Coleta
61243
Deer Grove
61252
East Clinton
61252
East Fulton
61250
Erie
61251
Fenton
61252
Fulton
61037
Galt
61252
Garden Plain
61270
Genesee
61283
Hahnaman
61277
Leon Corners
61261
Lyndon
61270
Malvern
61270
Morrison
61277
Portland
61277
Portland Corners
61277
Prophetstown
61071
Rock Falls
61270
Round Grove
61081
Sterling
61283
Tampico
61283
Thomas
61270
Union Grove
61270
Ustick
61277
Wethersfield
61071
Yeoward Addition
61071
Yeowardville
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).