ZIP & Postal Code Validator
Verify and lookup US ZIP codes or generate valid postal codes for development and testing worldwide.
Validator
Verify & Lookup
Real-time Verification
We check formats and location data for US ZIP codes to ensure accuracy.
Generator
Random Postal Codes
Comprehensive ZIP & Postal Code Guide
US ZIP Codes
A ZIP Code is a postal code used by the United States Postal Service (USPS). ZIP is an acronym for Zone Improvement Plan, introduced in 1963 to help mail travel more efficiently.
- Standard 5-digit codes
- ZIP+4 extension for precise locations
- Used for taxes and insurance rates
International Postal Codes
While the US uses ZIP codes, most other countries use Postal Codes. These can be purely numeric or alphanumeric, like Canada A1B 2C3 or the UK SW1A 1AA.
Format Variety:
Numeric: DE (5), CN (6), JP (7), IN (6)
Alphanumeric: CA (6), GB (5-7)
Why Validate ZIP Codes?
Proper postal code validation reduces shipping errors, ensures accurate tax calculation, and improves user experience during checkout processes.
Frequently Asked Questions
What is a ZIP+4 code?
It is a 4-digit extension added to the 5-digit ZIP code to identify a specific delivery route, such as a city block or a single building.
Does this tool support global codes?
Yes, we support format validation for over 10 major countries and provide location data for US ZIP codes.
Is the location data accurate?
Our US location database is updated regularly based on USPS data to provide city and state information for most valid ZIP codes.
Can I use these for testing?
Absolutely! Our generator is designed specifically for developers and QA testers who need valid postal code examples.