- DNS mirror from MvA Internet Services GmbH Effretikon, Switzerland
- Swinog (Swiss Network Operator Group) for their whitelist data.
- Marc Perkel from http://www.junkemailfilter.com/ for contributing his whitelist data.
- Rediris.es (Spanish Abuse Forum) for contributing their whitelist data.
- Arboris, ISP from Wiltshire, England, contributes their whitelist of UK and other businesses and organisations.
…and the many organisations and individuals who provide us with feedback and data.
…and all those who wrote fine free/open source software without which dnswl.org could not exist: rbldnsd, Apache Webserver, PostgreSQL, PHP and Perl, rsync, GnuPG, Request Tracker – plus all the others required to build the full network and application stack.