US United States Major Regions Postal Code Details
🏛️ Frederick · Maryland
21710Adamstown
Adamstown frederick maryland 21710 United States
21714Braddock Heights
Braddock Heights frederick maryland 21714 United States
21758Brunswick
Brunswick frederick maryland 21758 United States
21717Buckeystown
Buckeystown frederick maryland 21717 United States
21718Burkittsville
Burkittsville frederick maryland 21718 United States
21702College Estates
College Estates frederick maryland 21702 United States
21710Doubs
Doubs frederick maryland 21710 United States
21727Emmitsburg
Emmitsburg frederick maryland 21727 United States
21702Fort Detrick
Fort Detrick frederick maryland 21702 United States
21701Frederick
Frederick frederick maryland 21701 United States
21788Graceham
Graceham frederick maryland 21788 United States
21701Hood College
Hood College frederick maryland 21701 United States
21754Ijamsville
Ijamsville frederick maryland 21754 United States
21755Jefferson
Jefferson frederick maryland 21755 United States
21716Knoxville
Knoxville frederick maryland 21716 United States
21759Ladiesburg
Ladiesburg frederick maryland 21759 United States
21774Lake Linganore
Lake Linganore frederick maryland 21774 United States
21701Lewistown
Lewistown frederick maryland 21701 United States
21762Libertytown
Libertytown frederick maryland 21762 United States
21769Middletown
Middletown frederick maryland 21769 United States
21770Monrovia
Monrovia frederick maryland 21770 United States
21771Mount Airy
Mount Airy frederick maryland 21771 United States
21773Myersville
Myersville frederick maryland 21773 United States
21774New Market
New Market frederick maryland 21774 United States
21775New Midway
New Midway frederick maryland 21775 United States
21777Point Of Rocks
Point Of Rocks frederick maryland 21777 United States
21778Rocky Ridge
Rocky Ridge frederick maryland 21778 United States
21780Sabillasville
Sabillasville frederick maryland 21780 United States
21709State Farm Ins Co
State Farm Ins Co frederick maryland 21709 United States
21788Thurmont
Thurmont frederick maryland 21788 United States
21790Tuscarora
Tuscarora frederick maryland 21790 United States
21792Unionville
Unionville frederick maryland 21792 United States
21704Urbana
Urbana frederick maryland 21704 United States
21793Walkersville
Walkersville frederick maryland 21793 United States
21798Woodsboro
Woodsboro frederick maryland 21798 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).
