go
a.fi has one IP number , but the reverse is tld.ficora.fi. tld.ficora.fi, prifi.ficora.fi and ns1.8.5.3.e164.arpa point to the same IP. fi use this as a nameserver. a.fi is hosted on a server in Finland.

a.fi
a records
 
+ 193.166.4.1 193.166.0.0/15 AS1741 tld.ficora.fi
+ --- tld.ficora.fi

fi
ns-soa records
a.fi
+ 193.166.4.1 193.166.0.0/15 AS1741 tld.ficora.fi
+ --- tld.ficora.fi
ns records
a.fi
+ 193.166.4.1 193.166.0.0/15 AS1741 tld.ficora.fi
+ --- tld.ficora.fi
b.fi
+ 194.146.106.26 194.146.106.0/24 AS8674 fi1.dnsnode.net
+ --- fi1.dnsnode.net
c.fi
+ 128.214.4.29 128.214.0.0/16 AS1741 hydra.helsinki.fi
+ --- hydra.helsinki.fi
d.fi
+ 77.72.229.253 77.72.224.0/21 AS8674 -
+ --- -
e.fi
+ 194.0.1.14 194.0.1.0/24 AS42909 -
f.fi
+ 87.239.127.198 87.239.120.0/21 AS39662 -
ip numbers of host
193.166.4.1
ptrs of ip numbers
tld.ficora.fi
hostnames sharing ip with a-records
ns1.8.5.3.e164.arpa
prifi.ficora.fi
tld.ficora.fi
domains using this as nameserver
fi
domains using this as nameserver under another name
8.5.3.e164.arpa