Zipcodestack

About Zipcodestack

Zipcodestack is a REST API for postal code search, validation, and normalization across more than 210 countries. It offers a search endpoint for looking up zip codes globally or by country, and a distance endpoint that calculates the distance between two postal codes. The postal code database is sourced from official postal services and government databases, with monthly updates for most countries and more frequent updates for regions with frequent postal code changes.

The service is aimed at businesses needing address validation, shipping calculation, and location data, such as e-commerce and logistics platforms. Access requires registering for an API key, with a free tier offering 100 API calls per day (100 requests per day, up to 10 requests per minute). Paid plans provide higher limits, with the Business plan supporting up to 100,000 requests per day and 100 requests per second, along with additional features and priority support.

Key features

• Global postal/zip code search across 210+ countries
• Distance calculation between two zip codes
• REST API with apikey authentication
• Postal code database updated monthly, more often for fast-changing regions
• Rate-limited free tier with paid plans for higher volume

Frequently asked questions