A company database is only as reliable as the people who build it. Here you can read who runs the website, where the data comes from, how we work with it and what we deliberately do not do.

Operator

contactendatabase.nl is operated by Martin Adamec as a sole trader, active since . All prices are final prices. The full provider information is on the legal notice page.

The data and the website are managed by one person who has worked with public registers and company data for years. Emails are therefore answered by the person who also compiles the data. We would rather say openly what is missing from the data than promise a completeness we cannot demonstrate.

What we offer

  • Dutch company database: one-off exports in twenty-two industries, a whole industry from €239, selections by province, municipality or your own filters on request. As of 4 November 2026: 535,638 records, 513,153 of them with phone, email or website; source processed so far: Overture Maps, other sources are planned. We confirm scope and data date with every quotation. View industries
  • EU and other markets: compiled on request, with existing databases for a few other countries. More about other countries

How the data is created

  1. Basic data. Name, address and contact details so far come from the open map data of Overture Maps. OpenStreetMap and public registers are planned as further sources.
  2. Data from company websites (planned). Phone, general email address, website and Chamber of Commerce number are to be added from publicly accessible company websites.
  3. Matching and cleaning. We only attach contact details to a record if identifying features match, standardise formats and remove duplicate records.

We do not obtain bulk data from the KVK business register. Details and limits are on the data sources and methodology page.

What we do not do

  • We do not buy in old lists. The database is based on open data (so far Overture Maps; public registers and company websites are planned), not on resold address lists of unclear origin.
  • We do not supply consumer data. The data is B2B only: companies, freelancers and institutions.
  • We do not sell email lists for advertising mailings. Under Article 11.7 of the Telecommunications Act, unsolicited commercial email requires prior consent, also for legal entities, and an export does not contain it.
  • We do not promise complete accuracy. Registers contain errors and contact details age. We state data date and coverage and correct errors reported to us.
  • We do not take over your legal review. As the buyer, you are responsible for your use of the data.

Questions?

Write to info@contactendatabase.nl. The form is on the contact page, more about the author of the articles on the Martin Adamec page.