US United States Major Regions Postal Code Details
๐๏ธ Carroll ยท Maryland
21157
Carrollton
21757
Detour
21784
Eldersburg
21048
Finksburg
21784
Gaither
21074
Greenmount
21074
Hampstead
21104
Henryton
21757
Keymar
21102
Lineboro
21791
Linwood
21088
Manchester
21104
Marriottsville
21757
Middleburg
21102
Millers
21776
New Windsor
21048
Patapsco
21784
Sykesville
21787
Taneytown
21791
Union Bridge
21158
Westminster
21104
Woodstock
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).