US United States Major Regions Postal Code Details
🏛️ Union · Pennsylvania
17837Brook Park
Brook Park union pennsylvania 17837 United States
17837Buffalo X Rds
Buffalo X Rds union pennsylvania 17837 United States
17885Cherry Run
Cherry Run union pennsylvania 17885 United States
17837College Park
College Park union pennsylvania 17837 United States
17844Cowan
Cowan union pennsylvania 17844 United States
17844Dice
Dice union pennsylvania 17844 United States
17889Dry Valley
Dry Valley union pennsylvania 17889 United States
17837East Buffalo
East Buffalo union pennsylvania 17837 United States
17837Fairville
Fairville union pennsylvania 17837 United States
17844Foresthill
Foresthill union pennsylvania 17844 United States
17845Gleniron
Gleniron union pennsylvania 17845 United States
17829Hartleton
Hartleton union pennsylvania 17829 United States
17837Kelly
Kelly union pennsylvania 17837 United States
17837Kelly Point
Kelly Point union pennsylvania 17837 United States
17837Kelly X Rds
Kelly X Rds union pennsylvania 17837 United States
17845Laurel Park
Laurel Park union pennsylvania 17845 United States
17835Laurelton
Laurelton union pennsylvania 17835 United States
17886Lewisburg
Lewisburg union pennsylvania 17886 United States
17837Linntown
Linntown union pennsylvania 17837 United States
17837Lochiel
Lochiel union pennsylvania 17837 United States
17837Mazeppa
Mazeppa union pennsylvania 17837 United States
17844Mifflinburg
Mifflinburg union pennsylvania 17844 United States
17845Millmont
Millmont union pennsylvania 17845 United States
17855New Berlin
New Berlin union pennsylvania 17855 United States
17856New Columbia
New Columbia union pennsylvania 17856 United States
17844Red Bank
Red Bank union pennsylvania 17844 United States
17880Swengel
Swengel union pennsylvania 17880 United States
17883Vicksburg
Vicksburg union pennsylvania 17883 United States
17885Weikert
Weikert union pennsylvania 17885 United States
17837West Acres
West Acres union pennsylvania 17837 United States
17844West Buffalo
West Buffalo union pennsylvania 17844 United States
17886West Milton
West Milton union pennsylvania 17886 United States
17887White Deer
White Deer union pennsylvania 17887 United States
17844Whitesprings
Whitesprings union pennsylvania 17844 United States
17889Winfield
Winfield union pennsylvania 17889 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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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).
