Public DNS Server List


The accessibility and validity of all nameservers is checked continuously. A nameserver is valid if it passes the following checks:

Use the Global DNS Tester to test multiple servers for a specific hostname.

If you have any suggestions how to improve this service, please contact me via email/jabber.


To calculate the reliality of a nameserver the number of successful tests are divided by the total number of tests. A cronjob delete all tests older than 30 days once per day. Possible causes for a drop of the reliability are:


Download stats.rrd

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