Searching for 251.142.130.81.in-addr.arpa. PTR record at M.ROOT-SERVERS.NET. [202.12.27.33] 
...took 14 ms
Searching for 251.142.130.81.in-addr.arpa. PTR record at b.in-addr-servers.arpa. [199.253.183.183] ...took 6 ms
Searching for 251.142.130.81.in-addr.arpa. PTR record at b.in-addr-servers.arpa. [199.253.183.183] ...took 6 ms
Searching for pri.authdns.ripe.net. A record at M.ROOT-SERVERS.NET. [202.12.27.33] 
...took 15 ms
Searching for pri.authdns.ripe.net. A record at m.gtld-servers.net. [192.55.83.30] ...took 18 ms
Searching for pri.authdns.ripe.net. A record at ns3.lacnic.net. [200.3.13.14] ...took 197 ms
Searching for 251.142.130.81.in-addr.arpa. PTR record at pri.authdns.ripe.net. [193.0.9.5] 
...took 11 msSearching for pri.authdns.ripe.net. A record at m.gtld-servers.net. [192.55.83.30] ...took 18 ms
Searching for pri.authdns.ripe.net. A record at ns3.lacnic.net. [200.3.13.14] ...took 197 ms
Searching for ns0.bt.net. A record at M.ROOT-SERVERS.NET. [202.12.27.33] 
...took 15 ms
Searching for ns0.bt.net. A record at j.gtld-servers.net. [192.48.79.30] ...took 19 ms
Searching for ns0.bt.net. A record at ns0.bt.net. [217.35.209.188] ...took 26 ms
Searching for 251.142.130.81.in-addr.arpa. PTR record at ns0.bt.net. [217.35.209.188] 
...took 27 msSearching for ns0.bt.net. A record at j.gtld-servers.net. [192.48.79.30] ...took 19 ms
Searching for ns0.bt.net. A record at ns0.bt.net. [217.35.209.188] ...took 26 ms
Searching for b-ns.bt.com. A record at M.ROOT-SERVERS.NET. [202.12.27.33] 
...took 15 ms
Searching for b-ns.bt.com. A record at m.gtld-servers.net. [192.55.83.30] ...took 18 ms
Searching for b-ns.bt.com. A record at eddns0.bt.com. [193.113.57.242] ...took 29 ms
Searching for 251.142.130.81.in-addr.arpa. PTR record at b-ns.bt.com. [109.159.245.17] 
...took 25 msSearching for b-ns.bt.com. A record at m.gtld-servers.net. [192.55.83.30] ...took 18 ms
Searching for b-ns.bt.com. A record at eddns0.bt.com. [193.113.57.242] ...took 29 ms
| Domain | Type | TTL | Answer | 
|---|---|---|---|
| 251.142.130.81.in-addr.arpa. | PTR | 21600 | host81-130-142-251.in-addr.btopenworld.com. | 
Total elapsed query time: 435 ms
