121.72.175 is a class C of IPs

Sample IPs from the class C 121.72.175

121.72.175.9	View precise location of 121.72.175.9 on the map!
121.72.175.236	View precise location of 121.72.175.236 on the map!
121.72.175.141	View precise location of 121.72.175.141 on the map!
121.72.175.61	View precise location of 121.72.175.61 on the map!
121.72.175.53	View precise location of 121.72.175.53 on the map!
121.72.175.165	View precise location of 121.72.175.165 on the map!
121.72.175.215	View precise location of 121.72.175.215 on the map!
121.72.175.54	View precise location of 121.72.175.54 on the map!
121.72.175.157	View precise location of 121.72.175.157 on the map!
121.72.175.86	View precise location of 121.72.175.86 on the map!
121.72.175.102	View precise location of 121.72.175.102 on the map!

10 Random IPs

131.137.84.244	Find precise map location of 131.137.84.244
100.185.204.185	Find precise map location of 100.185.204.185
144.112.247.133	Find precise map location of 144.112.247.133
238.198.167.111	Find precise map location of 238.198.167.111
213.125.228.105	Find precise map location of 213.125.228.105
131.151.117.186	Find precise map location of 131.151.117.186
35.171.186.112	Find precise map location of 35.171.186.112
163.94.98.10	Find precise map location of 163.94.98.10
230.25.154.86	Find precise map location of 230.25.154.86
163.12.122.127	Find precise map location of 163.12.122.127
113.130.9.221	Find precise map location of 113.130.9.221

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