120.51.6 is a class C of IPs

Sample IPs from the class C 120.51.6

120.51.6.63	View precise location of 120.51.6.63 on the map!
120.51.6.96	View precise location of 120.51.6.96 on the map!
120.51.6.80	View precise location of 120.51.6.80 on the map!
120.51.6.226	View precise location of 120.51.6.226 on the map!
120.51.6.138	View precise location of 120.51.6.138 on the map!
120.51.6.121	View precise location of 120.51.6.121 on the map!
120.51.6.159	View precise location of 120.51.6.159 on the map!
120.51.6.92	View precise location of 120.51.6.92 on the map!
120.51.6.115	View precise location of 120.51.6.115 on the map!
120.51.6.67	View precise location of 120.51.6.67 on the map!
120.51.6.4	View precise location of 120.51.6.4 on the map!

10 Random IPs

121.163.230.47	Find precise map location of 121.163.230.47
69.144.196.70	Find precise map location of 69.144.196.70
7.197.58.108	Find precise map location of 7.197.58.108
249.196.210.155	Find precise map location of 249.196.210.155
201.112.180.98	Find precise map location of 201.112.180.98
70.255.29.54	Find precise map location of 70.255.29.54
5.43.157.183	Find precise map location of 5.43.157.183
37.138.115.221	Find precise map location of 37.138.115.221
232.244.44.112	Find precise map location of 232.244.44.112
94.126.121.198	Find precise map location of 94.126.121.198
73.199.145.131	Find precise map location of 73.199.145.131

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