PostcodeData.nl

API

Free Dutch geolocation API for postcode and street number lookup

Overview

PostcodeData.nl is a RESTful API that delivers geolocation and address details for Dutch locations using postcodes and street numbers. Its core endpoint accepts parameters like postcode, streetnumber, reference domain, and returns JSON-formatted data including latitude/longitude coordinates, municipality, city, province, and full address components. Use cases include validating Dutch addresses in e-commerce platforms, optimizing delivery routes for logistics, enriching customer databases with geospatial information, and enabling location-based features in Netherlands-focused applications.

Example Integration (JavaScript)

script.js JS


fetch('http://api.postcodedata.nl/v1/postcode/?postcode=1211EP&streetnumber=60&ref=domeinnaam.nl&type=json')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful interface
JSON response format
No API key required
Dutch postcode & street number lookup
Returns lat/lng and address details (city, province, municipality)

Frequently Asked Questions

? Is PostcodeData.nl free to use?

Yes, PostcodeData.nl offers free access for retrieving Dutch geolocation data via postcode lookup.

? Does it require an API Key?

No, the API does not require an API key for basic requests, as seen in the example endpoint.

? What is the response format?

The response format is JSON, which can be specified using the 'type=json' parameter in the request.

Top Alternatives

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Tool Info

Pricing Free

Category Geocoding

Platform Public API

Pros

⊕ Simple parameter-based queries
⊕ Accurate Dutch geolocation data
⊕ Easy integration with most programming languages
⊕ Free access for basic usage

Cons

⊖ HTTP-only (no HTTPS support)
⊖ Limited to Dutch addresses
⊖ Potential rate limits for free usage
⊖ No official service level agreement (SLA)