139.72.51 is a class C of IPs

Sample IPs from the class C 139.72.51

139.72.51.178	View precise location of 139.72.51.178 on the map!
139.72.51.212	View precise location of 139.72.51.212 on the map!
139.72.51.86	View precise location of 139.72.51.86 on the map!
139.72.51.228	View precise location of 139.72.51.228 on the map!
139.72.51.138	View precise location of 139.72.51.138 on the map!
139.72.51.211	View precise location of 139.72.51.211 on the map!
139.72.51.105	View precise location of 139.72.51.105 on the map!
139.72.51.30	View precise location of 139.72.51.30 on the map!
139.72.51.173	View precise location of 139.72.51.173 on the map!
139.72.51.36	View precise location of 139.72.51.36 on the map!
139.72.51.10	View precise location of 139.72.51.10 on the map!

10 Random IPs

236.120.153.50	Find precise map location of 236.120.153.50
71.31.155.186	Find precise map location of 71.31.155.186
28.86.113.22	Find precise map location of 28.86.113.22
143.139.152.93	Find precise map location of 143.139.152.93
152.187.179.86	Find precise map location of 152.187.179.86
56.29.251.127	Find precise map location of 56.29.251.127
24.177.124.151	Find precise map location of 24.177.124.151
84.51.167.109	Find precise map location of 84.51.167.109
248.136.216.210	Find precise map location of 248.136.216.210
162.224.43.24	Find precise map location of 162.224.43.24
44.217.100.98	Find precise map location of 44.217.100.98

TestURI.org is a free web-sniffer.net alternative. It alows you to send custom HTTP request and check the HTTP response.