go
h.ns.se has one IP number , but the reverse is acns1.nstld.com. acns1.nstld.com point to the same IP. se use this as a nameserver. h.ns.se is hosted on a server in United States even though the hostname implies Sweden.

h.ns.se
a records
 
+ 199.7.49.30 199.7.49.0/24 AS26415 acns1.nstld.com
+ --- acns1.nstld.com
ip numbers of host
199.7.49.30
ptrs of ip numbers
acns1.nstld.com
hostnames sharing ip with a-records
acns1.nstld.com
domains using this as nameserver
se