go
ns4.nus.nic.nu has one IP number , which also has a corresponding reverse pointer. nu and nic.nu use this as a nameserver. ns4.nus.nic.nu is hosted on a server in United States even though the hostname implies Niue.

ns4.nus.nic.nu
a records
 
+ 156.154.104.13 156.154.104.0/24 AS12008 -
+ --- -
ip numbers of host
156.154.104.13
ptrs of ip numbers
ns4.nus.nic.nu
ip numbers using ptr to this host
156.154.104.13
domains using this as nameserver
nic.nu
nu