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Bulk ZIP code lookup
Turn a list of ZIP codes into city, state and coordinates. Paste up to 300 codes or upload a CSV file.
Typical uses
- Enrich a customer list with city and state for reporting and segmentation.
- Geocode addresses roughly by postal code before plotting them on a map.
- Clean an import: codes that come back “Not found” are usually typos.
Bulk lookups by API
Coverage and fields for all 149 countries are on the international postal code API page.
Look up to 100 codes per request:
curl "https://api.zipcodestack.com/v1/search?codes=10001,90210,60601&country=us" -H "apikey: YOUR-API-KEY"
Frequently asked questions
How do I convert ZIP codes to cities in bulk?
Paste the ZIP codes (one per line) or upload a CSV with the codes in the first column, pick the country and click Look up. Download the result as CSV with city, state, latitude and longitude.
How do I get latitude and longitude for ZIP codes?
The bulk lookup returns the centre coordinates of each postal code. For more than 300 codes, the zipcodestack API looks up 100 codes per request.
Can I look up codes from different countries?
Run one lookup per country. Postal codes are only unique within a country: 10115 is Berlin in Germany but does not exist in the US.
Postal code API
Get this data in your app
zipcodestack looks up, validates and searches postal codes in 149 countries: city, state, coordinates, distances and radius search, as JSON.
/v1/search documentation International postal code API All documentation
300 free requests every month. No credit card required.
GET https://api.zipcodestack.com/v1/search?codes=10001,90210,60601&country=us
{
"results": {
"10001": [{
"postal_code": "10001",
"country_code": "US",
"latitude": 40.7484,
"longitude": -73.9967,
"city": "New York",
"state": "New York",
"state_code": "NY",
"province": "New York"
}]
}
}Free postal code tools
Distance between ZIP codes
Miles or km between ZIP codes.
ZIP codes in a drawn area
Draw an area, get its codes.
What is my ZIP code?
Find the ZIP code where you are.
ZIP code radius search
All codes within X miles of a code.
Postal code validator
Is this postal code real?
Postal codes by countryFormats, regions and cities for 149 countries.