US United States Major Regions Postal Code Details
🏛️ Loudoun · Virginia
20105Aldie
Aldie loudoun virginia 20105 United States
20598Alexandria
Alexandria loudoun virginia 20598 United States
20166Arcola
Arcola loudoun virginia 20166 United States
20598Arlington
Arlington loudoun virginia 20598 United States
20149Ashburn
Ashburn loudoun virginia 20149 United States
20148Brambleton
Brambleton loudoun virginia 20148 United States
20148Broadlands
Broadlands loudoun virginia 20148 United States
20598Chantilly
Chantilly loudoun virginia 20598 United States
20598Dept HS
Dept HS loudoun virginia 20598 United States
20598DHS
DHS loudoun virginia 20598 United States
20103Dulles
Dulles loudoun virginia 20103 United States
20102Dulles Air Transfer Office
Dulles Air Transfer Office loudoun virginia 20102 United States
20101Dulles P & D Center
Dulles P & D Center loudoun virginia 20101 United States
20598Fairfax
Fairfax loudoun virginia 20598 United States
20598Falls Church
Falls Church loudoun virginia 20598 United States
20159Hamilton
Hamilton loudoun virginia 20159 United States
20598Herndon
Herndon loudoun virginia 20598 United States
20134Hillsboro
Hillsboro loudoun virginia 20134 United States
20104Inspection Service Forensic
Inspection Service Forensic loudoun virginia 20104 United States
20176Lansdowne
Lansdowne loudoun virginia 20176 United States
20177Leesburg
Leesburg loudoun virginia 20177 United States
20160Lincoln
Lincoln loudoun virginia 20160 United States
20598Lorton
Lorton loudoun virginia 20598 United States
20180Lovettsville
Lovettsville loudoun virginia 20180 United States
20176Lucketts
Lucketts loudoun virginia 20176 United States
20598Mc Lean
Mc Lean loudoun virginia 20598 United States
20598McLean
McLean loudoun virginia 20598 United States
20117Middleburg
Middleburg loudoun virginia 20117 United States
20149Natl Assn Letter Carriers
Natl Assn Letter Carriers loudoun virginia 20149 United States
20129Paeonian Springs
Paeonian Springs loudoun virginia 20129 United States
20131Philomont
Philomont loudoun virginia 20131 United States
20165Potomac Falls
Potomac Falls loudoun virginia 20165 United States
20132Purcellville
Purcellville loudoun virginia 20132 United States
20598Reston
Reston loudoun virginia 20598 United States
20142Round Hill
Round Hill loudoun virginia 20142 United States
20152South Riding
South Riding loudoun virginia 20152 United States
20598Springfield
Springfield loudoun virginia 20598 United States
20103Stamp Distribution Network
Stamp Distribution Network loudoun virginia 20103 United States
20167Sterling
Sterling loudoun virginia 20167 United States
20105Stone Ridge
Stone Ridge loudoun virginia 20105 United States
20197Waterford
Waterford loudoun virginia 20197 United States
📋 United States Address and Delivery Guidance
📮
Use a Complete Delivery Address:
Include the recipient name, building or street address, locality, region where applicable, postal code when the destination uses one, and the destination country or territory.
🌍
Follow Local Address Conventions:
Use the language, character set and address order requested by the recipient, official postal operator or carrier. Do not assume every destination uses the same postal-code format.
✅
Verify Before Dispatch:
Confirm the postal code, service coverage and any customs or carrier requirements with the recipient and the relevant official postal operator before shipping.
💡
Delivery Information Is Context-Specific:
Postal codes help routing only in territories that use them. Accurate recipient details remain essential for delivery in every destination.
Postal information, sources and verification
Use this page as a routing reference and confirm the complete address, postal code format and delivery restrictions with the relevant official postal operator or carrier before dispatch.
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📮United States Postal FAQ and delivery guidance
📮 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.
🔍 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.
⚠️ 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.
🔄 Do ZIP codes ever change?
Yes, USPS may update ZIP codes due to regional adjustments. Always confirm your ZIP code after an address change.
📦 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).
