Enter a US ZIP or Canadian postal code (FSA) and find every nearby code within 5, 10, 20 or 50 miles. Sorted by distance.
| ZIP | City | State | Miles | KM |
|---|
We use the haversine formula to calculate the great-circle distance between the center of each ZIP code and the one you entered. Distance is measured in straight line miles, not driving distance.
Our database is built from GeoNames, an open-source geographic database used by Wikipedia, Apple, Microsoft and many others. It covers all 41,000+ US ZIP codes and 1,600+ Canadian Forward Sortation Areas (FSA).
Full Canadian postal codes (like K1A 0B1) are licensed by Canada Post and not freely available. Forward Sortation Areas (the first 3 characters, like K1A) are the publicly available granularity. They cover roughly the same geographic area as a US ZIP code.
Geo-targeting in marketing, defining service areas, sales territory mapping, finding stores within a region, demographic analysis, lead-list segmentation, address validation tooling — anywhere you need to know which postal codes are near a given one.
Yes — call /api/zip_radius.php?country=US&zip=10001&radius=10 and you'll get JSON back. Rate-limited to 30 requests/minute, 200/hour, 1500/day per IP. No authentication required for casual use.
BIN lookup, card & data validation, fraud signals — one clean REST API. 500 requests/day free, no credit card required.