51.121.6 is a class C of IPs

Sample IPs from the class C 51.121.6

51.121.6.200	View precise location of 51.121.6.200 on the map!
51.121.6.7	View precise location of 51.121.6.7 on the map!
51.121.6.223	View precise location of 51.121.6.223 on the map!
51.121.6.98	View precise location of 51.121.6.98 on the map!
51.121.6.171	View precise location of 51.121.6.171 on the map!
51.121.6.87	View precise location of 51.121.6.87 on the map!
51.121.6.110	View precise location of 51.121.6.110 on the map!
51.121.6.101	View precise location of 51.121.6.101 on the map!
51.121.6.20	View precise location of 51.121.6.20 on the map!
51.121.6.194	View precise location of 51.121.6.194 on the map!
51.121.6.52	View precise location of 51.121.6.52 on the map!

10 Random IPs

138.171.8.133	Find precise map location of 138.171.8.133
149.43.200.186	Find precise map location of 149.43.200.186
128.10.208.64	Find precise map location of 128.10.208.64
97.190.168.152	Find precise map location of 97.190.168.152
191.219.69.111	Find precise map location of 191.219.69.111
204.255.16.107	Find precise map location of 204.255.16.107
99.107.8.251	Find precise map location of 99.107.8.251
223.7.103.65	Find precise map location of 223.7.103.65
145.97.83.139	Find precise map location of 145.97.83.139
245.150.232.190	Find precise map location of 245.150.232.190
149.253.94.97	Find precise map location of 149.253.94.97

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