Reverse DNS Lookup for 194.157.172.21

Searching for 21.172.157.194.in-addr.arpa. PTR record at C.ROOT-SERVERS.NET. [192.33.4.12] ...took 66 ms
Searching for 21.172.157.194.in-addr.arpa. PTR record at b.in-addr-servers.arpa. [199.253.183.183] ...took 14 ms

Searching for pri.authdns.ripe.net. A record at K.ROOT-SERVERS.NET. [193.0.14.129] ...took 11 ms
Searching for pri.authdns.ripe.net. A record at a.gtld-servers.net. [192.5.6.30] ...took 24 ms
Searching for pri.authdns.ripe.net. A record at ns3.lacnic.net. [200.3.13.14] ...took 223 ms

Searching for 21.172.157.194.in-addr.arpa. PTR record at pri.authdns.ripe.net. [193.0.9.5] ...took 12 ms
SERVFAIL
Searching for 21.172.157.194.in-addr.arpa. PTR record at ns3.lacnic.net. [200.3.13.14] ...took 221 ms

Searching for ns.ripe.net. A record at K.ROOT-SERVERS.NET. [193.0.14.129] ...took 12 ms
Searching for ns.ripe.net. A record at h.gtld-servers.net. [192.54.112.30] ...took 6 ms
Searching for ns.ripe.net. A record at ns3.afrinic.net. [204.61.216.100] ...took 11 ms

Searching for 21.172.157.194.in-addr.arpa. PTR record at ns.ripe.net. [193.0.9.6] ...took 12 ms
SERVFAIL

Searching for ns-fi.elisa.net. A record at B.ROOT-SERVERS.NET. [192.228.79.201] ...took 63 ms
Searching for ns-fi.elisa.net. A record at j.gtld-servers.net. [192.48.79.30] ...took 11 ms
Searching for ns-fi.elisa.net. A record at ns-fi.elisa.net. [193.229.0.49] ...took 28 ms

Searching for 21.172.157.194.in-addr.arpa. PTR record at ns-fi.elisa.net. [193.229.0.49] ...took 28 ms

Nameserver ns-fi.elisa.net. reports: No such host 21.172.157.194.in-addr.arpa.

Total elapsed query time: 742 ms