US United States Major Regions Postal Code Details
🏛️ Saint Charles · Missouri
63332Augusta
Augusta saint charles missouri 63332 United States
63301Black Walnut
Black Walnut saint charles missouri 63301 United States
63338Cottleville
Cottleville saint charles missouri 63338 United States
63368Dardenne
Dardenne saint charles missouri 63368 United States
63368Dardenne Prairie
Dardenne Prairie saint charles missouri 63368 United States
63341Defiance
Defiance saint charles missouri 63341 United States
63332Femme Osage
Femme Osage saint charles missouri 63332 United States
63346Flinthill
Flinthill saint charles missouri 63346 United States
63348Foristell
Foristell saint charles missouri 63348 United States
63385Gilmore
Gilmore saint charles missouri 63385 United States
63303Harvester
Harvester saint charles missouri 63303 United States
63385Josephville
Josephville saint charles missouri 63385 United States
63301Kampville
Kampville saint charles missouri 63301 United States
63301Kampville Beach
Kampville Beach saint charles missouri 63301 United States
63301Kampville Court
Kampville Court saint charles missouri 63301 United States
63367Lake Saint Louis
Lake Saint Louis saint charles missouri 63367 United States
63373Machens
Machens saint charles missouri 63373 United States
63341Matson
Matson saint charles missouri 63341 United States
63365New Melle
New Melle saint charles missouri 63365 United States
63376O Fallon
O Fallon saint charles missouri 63376 United States
63301Orchard Farm
Orchard Farm saint charles missouri 63301 United States
63373Portage Des Sioux
Portage Des Sioux saint charles missouri 63373 United States
63304Saint Charles
Saint Charles saint charles missouri 63304 United States
63366Saint Paul
Saint Paul saint charles missouri 63366 United States
63376Saint Peters
Saint Peters saint charles missouri 63376 United States
63332Schluersburg
Schluersburg saint charles missouri 63332 United States
63301South Shore
South Shore saint charles missouri 63301 United States
63304Weldon Spring
Weldon Spring saint charles missouri 63304 United States
63304Weldon Spring Heights
Weldon Spring Heights saint charles missouri 63304 United States
63385Wentzville
Wentzville saint charles missouri 63385 United States
63386West Alton
West Alton saint charles missouri 63386 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.
Editorial and service accountability
This postal-code reference is maintained by the 56ok.com logistics-content team for international shipping preparation. It is reviewed against publicly available postal-operator information; it is not an official postal authority and does not replace carrier or customs instructions.
This reference is maintained as postal and carrier information changes. Need a correction? Contact our team.
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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).
