Associated host objects (glue records)¶
Host objects, or often also referred to as glue records allow you to put the IPv4/IPv6 address of a DNS server in the registry's DNS server if your DNS server is on the same domain it is authoritative for.
As an example consider our own zone as207960.net. Its name servers are:
ns1.as207960.netns2.as207960.net
These are hosted on the same zone as they need to answer for, that is to ask ns1.as207960.net what the address of as207960.net is you'll already need to know the address of ns1.as207960.net.
The solution to this is host objects, such that when someones queries .net for as207960.net, the .net servers will return along with the answer additional data to say "Hey, you'll probably need to know this IP address to query further".