US United States Major Regions Postal Code Details
๐๏ธ Arlington ยท Virginia
22227
Arlington
22244
Assistant Secretary Of Navy
22202
Crystal City
22225
Dept Of The Navy
22226
FDIC
22211
Fort Myer
22230
National Science Foundation
22243
Naval Air System Command
22241
Naval Supply System Command
22212
Navy Mutual Aid Assoc
22242
Navy Sea Systems Command
22217
Office Of Naval Research
22209
Rosslyn
22204
South
22245
Space & Naval Warfare System
22227
US Air
22240
US Navy Accounting Office
22246
US Unmanned Aerial Vehicles
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).