US United States Major Regions Postal Code Details
๐๏ธ Butler ยท Pennsylvania
16018
Annandale
16038
Barkeyville
16016
Boyers
16021
Branchton
16022
Bruin
16001
Butler
16023
Cabot
16024
Callery
16025
Chicora
16027
Connoquenessing
16066
Cranberry Township
16029
East Butler
16030
Eau Claire
16033
Evans City
16034
Fenelton
16035
Forestville
16037
Harmony
16038
Harrisville
16039
Herman
16040
Hilliards
16041
Karns City
16045
Lyndora
16046
Mars
16023
Marwood
16001
Meridian
16018
Natl Agency For Check Inqu
16048
North Washington
16017
Office Of Personnel Mgmt
16050
Petrolia
16051
Portersville
16052
Prospect
16053
Renfrew
16055
Sarver
16056
Saxonburg
16046
Seven Fields
16057
Slippery Rock
16016
Social Security Admin
16059
Valencia
16061
West Sunbury
16063
Zelienople
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).