US United States Major Regions Postal Code Details
๐๏ธ Harford ยท Maryland
21001
Aberdeen
21010
Aberdeen Proving Ground
21009
Abingdon
21015
Bel Air
21017
Belcamp
21018
Benson
21160
Cardiff
21028
Churchville
21034
Darlington
21040
Edgewood
21010
Edgewood Arsenal
21047
Fallston
21050
Forest Hill
21010
Gunpowder
21078
Havre De Grace
21084
Jarrettsville
21085
Joppa
21085
Joppatown
21085
Joppatowne
21161
Norrisville
21130
Perryman
21132
Pylesville
21017
Riverside
21154
Street
21161
White Hall
21160
Whiteford
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).