Reverse DNS Lookup for 172.56.13.239

Searching for 239.13.56.172.in-addr.arpa. PTR record at M.ROOT-SERVERS.NET. [202.12.27.33] ...took 14 ms
Searching for 239.13.56.172.in-addr.arpa. PTR record at a.in-addr-servers.arpa. [199.180.182.53] ...took 91 ms

Searching for x.arin.net. A record at M.ROOT-SERVERS.NET. [202.12.27.33] ...took 14 ms
Searching for x.arin.net. A record at m.gtld-servers.net. [192.55.83.30] ...took 19 ms
Searching for x.arin.net. A record at u.arin.net. [204.61.216.50] ...took 6 ms

Searching for 239.13.56.172.in-addr.arpa. PTR record at x.arin.net. [199.180.180.63] ...took 92 ms

Searching for ns10.tmobileus.net. A record at M.ROOT-SERVERS.NET. [202.12.27.33] ...took 15 ms
Searching for ns10.tmobileus.net. A record at j.gtld-servers.net. [192.48.79.30] ...took 18 ms

Searching for auth2.dns.cogentco.com. A record at M.ROOT-SERVERS.NET. [202.12.27.33] ...took 14 ms
Searching for auth2.dns.cogentco.com. A record at m.gtld-servers.net. [192.55.83.30] ...took 19 ms
Searching for auth2.dns.cogentco.com. A record at auth1.dns.cogentco.com. [66.28.0.14] ...took 11 ms

Searching for ns10.tmobileus.net. A record at auth2.dns.cogentco.com. [66.28.0.30] ...took 11 ms

Searching for 239.13.56.172.in-addr.arpa. PTR record at ns10.tmobileus.net. [208.54.99.244] ...took 123 ms
REFUSED

Searching for ns10.tmobileus.com. A record at M.ROOT-SERVERS.NET. [202.12.27.33] ...took 15 ms
Searching for ns10.tmobileus.com. A record at e.gtld-servers.net. [192.12.94.30] ...took 25 ms
Searching for ns10.tmobileus.com. A record at auth2.dns.cogentco.com. [66.28.0.30] ...took 11 ms

Searching for 239.13.56.172.in-addr.arpa. PTR record at ns10.tmobileus.com. [208.54.147.200] ...took 156 ms
REFUSED
Searching for 239.13.56.172.in-addr.arpa. PTR record at ns10.tmobileus.com. [208.54.147.200] ...took 156 ms
REFUSED
Searching for 239.13.56.172.in-addr.arpa. PTR record at ns10.tmobileus.net. [208.54.99.244] ...took 124 ms
REFUSED

None of the nameservers responded correctly.

Total elapsed query time: 934 ms