US United States Major Regions Postal Code Details
๐๏ธ Alamosa ยท Colorado
81102
Adams State College
81102
Alamosa
81101
Carmel
81101
East Alamosa
81101
Estrella
81101
Great Sand Dunes National Mo
81101
Henry
81136
Hooper
81146
Mosca
81101
Sand Dunes Mo
81101
Stanley
81101
Washington
81101
Waverly
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).