51.216.231 is a class C of IPs

Sample IPs from the class C 51.216.231

51.216.231.64	View precise location of 51.216.231.64 on the map!
51.216.231.100	View precise location of 51.216.231.100 on the map!
51.216.231.239	View precise location of 51.216.231.239 on the map!
51.216.231.197	View precise location of 51.216.231.197 on the map!
51.216.231.109	View precise location of 51.216.231.109 on the map!
51.216.231.171	View precise location of 51.216.231.171 on the map!
51.216.231.170	View precise location of 51.216.231.170 on the map!
51.216.231.220	View precise location of 51.216.231.220 on the map!
51.216.231.171	View precise location of 51.216.231.171 on the map!
51.216.231.60	View precise location of 51.216.231.60 on the map!
51.216.231.89	View precise location of 51.216.231.89 on the map!

10 Random IPs

27.254.149.249	Find precise map location of 27.254.149.249
190.180.19.2	Find precise map location of 190.180.19.2
75.47.145.11	Find precise map location of 75.47.145.11
122.237.160.131	Find precise map location of 122.237.160.131
83.168.177.202	Find precise map location of 83.168.177.202
100.188.88.76	Find precise map location of 100.188.88.76
36.142.223.80	Find precise map location of 36.142.223.80
83.239.94.64	Find precise map location of 83.239.94.64
23.10.134.173	Find precise map location of 23.10.134.173
177.81.110.33	Find precise map location of 177.81.110.33
15.215.119.123	Find precise map location of 15.215.119.123

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