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Hostname or IP Type  
Searching for 237.172.158.81.in-addr.arpa. PTR record at A.ROOT-SERVERS.NET. [198.41.0.4] ...took 1 ms
Searching for 237.172.158.81.in-addr.arpa. PTR record at b.in-addr-servers.arpa. [199.253.183.183] ...took 9 ms
Searching for ns3.nic.fr. A record at A.ROOT-SERVERS.NET. [198.41.0.4] ...took 1 ms
Searching for ns3.nic.fr. A record at f.ext.nic.fr. [194.146.106.46] ...took 1 ms
Searching for ns3.nic.fr. A record at ns3.nic.fr. [192.134.0.49] ...took 22 ms
Searching for 237.172.158.81.in-addr.arpa. PTR record at ns3.nic.fr. [192.134.0.49] ...took 23 ms
Searching for ns1.bt.net. A record at A.ROOT-SERVERS.NET. [198.41.0.4] ...took 1 ms
Searching for ns1.bt.net. A record at h.gtld-servers.net. [192.54.112.30] ...took 8 ms
Searching for ns1.bt.net. A record at ns2.bt.net. [217.32.105.90] ...took 21 ms
Searching for 237.172.158.81.in-addr.arpa. PTR record at ns1.bt.net. [217.32.105.91] ...took 21 ms
Searching for 237.172.158.81.in-addr.arpa. PTR record at ns21.bt.net. [217.35.209.187] ...took 26 ms
DomainTypeTTLAnswer
237.172.158.81.in-addr.arpa.PTR604800host81-158-172-237.range81-158.btcentralplus.com.



Total elapsed query time: 134 ms