# Pro6PP > Pro6PP is a premium postal code API and database service providing accurate address validation and autocomplete for the Netherlands, Germany, Belgium, Luxembourg, France, Denmark, Switzerland, and other European countries. The service offers both cloud-based API access and downloadable databases for offline use, with monthly data updates. ## Key Features Pro6PP specializes in: - **Real-time address validation**: Validate addresses instantly using postal codes and house numbers - **Address autocomplete**: Provide seamless address input experiences in webshops and CRM systems - **Geographic data**: Access coordinates (latitude/longitude), postal code ranges, and distance calculations - **Multi-country support**: Comprehensive coverage for Netherlands, Germany, Belgium, Luxembourg, France, Denmark, Austria, Switzerland, and expanding - **Flexible integration**: Cloud-based API with unlimited calls or downloadable databases for offline usage - **Monthly updates**: Up to date governmental data published on the 1st of every month ## API Documentation - [API Information](https://www.pro6pp.com/developer): Basic API structure, authentication, designed for developers - [Address Autocomplete](https://www.pro6pp.com/demo/address-validation/nl): Demo and implementation guide for address validation and autocomplete functionality - [Postal Code Range](https://www.pro6pp.com/demo/nearby/nl): Retrieve surrounding postal codes within a specified radius - [Support & FAQ](https://www.pro6pp.com/support): Common questions, database formats, and troubleshooting ## Integration Resources - [API Status Monitor](https://status.pro6pp.nl): Real-time API availability and performance monitoring - [Demo Page](https://www.pro6pp.com/demo/address-validation/nl): Live demonstration of address validation and autocomplete ## Country Guides In-depth, per-country guides to address data, validation and geocoding. International guides live on pro6pp.com; the Dutch-language guides live on pro6pp.nl. - [Address API in France](https://www.pro6pp.com/fr/nouvelles/api-adresse-france): BAN and Géoplateforme, geocoding, postal-address verification and autocomplete (French) - [Adressprüfung & address validation in Germany](https://www.pro6pp.com/de/nachricht/adresspruefung-adressvalidierung): Address validation and correction via API for webshops (German) - [Postal codes in Denmark](https://www.pro6pp.com/da/nyheder/postnumre-i-danmark): Danish postnumre, DAWA/DAR context, API and database (Danish) - [Postal codes in Switzerland (PLZ)](https://www.pro6pp.com/de/nachricht/plz-schweiz-karte-liste): Swiss PLZ map, list and municipality data (German) - [Postal codes in Switzerland (NPA)](https://www.pro6pp.com/fr/nouvelles/npa-code-postal-suisse): Swiss NPA for French-speaking Switzerland (French) - [Postcodes in Belgium](https://www.pro6pp.com/fr/nouvelles/codes-postaux-belgique): Belgian postcodes and communes (French) - [Postcodes in Belgium](https://www.pro6pp.nl/nieuws/postcodes-opzoeken-belgie): Belgian postcodes and communes (Dutch) ## Use Cases Pro6PP is commonly used for: - **E-commerce**: Reduce delivery errors through accurate address validation in webshops - **CRM Systems**: Ensure clean address data in customer relationship management - **Store Locators**: Find nearest stores using postal code proximity searches - **Logistics**: Calculate travel time and distance between addresses for transport companies - **Database Management**: Maintain up-to-date postal code databases for offline applications ## Authentication All API requests require an `auth_key` parameter, received via email upon registration. The API provides JSON output formats. ## Contact - Questions: support@pro6pp.nl - Website: https://www.pro6pp.nl (Dutch) / https://www.pro6pp.com (International)