Check the DNS setup for a domain. The test shows whether there are setup errors for one or more name servers.
You can test a domain name and name servers that are not published in DNS, and also changes on name servers for a given domain name before the change is published. If the test result is OK you can count on that the name server will answer enqueries about the domain. However, there may still be errors in the zone information which this test does not know about.
Here you can test domain names and name servers and changes to these before they are published in DNS.
A reverse inquiry can be used to find a random domain name which is affiliated with an IP address.
For an IPv4 address you have to find the network address of the system. Most often this ends with a 0 (zero). Then you delete the last 0 (zero) and change the order of the figures you have received, then add the suffix in-addr.arpa. You follow the same steps if you have an IPv6 address, except that the suffix added is ip6.arpa.
Example 1 - reverse inquiry for an IPv4 network: The network address is 194.98.30.0 which gives the reverse inquiry zone 30.98.194.in-addr.arpa.
Example 2 - reverse enquiry for an IPv6 network: The network address is 2001:660:3003::0 which gives the reverse inquiry zone 3.0.0.3.0.6.6.0.1.0.0.2.ip6.arpa.
State unpublished DS records to test against your published DNSSEC keys.
