US United States Major Regions Postal Code Details
๐๏ธ Solano ยท California
95688
Allendale
94589
American Canyon
94510
Benicia
94512
Birds Landing
95620
Dixon
95625
Elmira
94535
Fairfield
95620
Liberty Farms
94592
Mare Island
94571
Rio Vista
94534
Suisun City
94535
Travis AFB
95688
Vacaville
94591
Vallejo
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).