US United States Major Regions Postal Code Details
๐๏ธ Pottawattamie ยท Iowa
51521
Avoca
51525
Carson
51510
Carter Lake
51501
Council Bluffs
51526
Crescent
51536
Hancock
51542
Honey Creek
51549
Macedonia
51501
Manawa
51548
Mc Clelland
51553
Minden
51559
Neola
51560
Oakland
51575
Treynor
51576
Underwood
51577
Walnut
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).