51.136.66 is a class C of IPs

Sample IPs from the class C 51.136.66

51.136.66.56	View precise location of 51.136.66.56 on the map!
51.136.66.254	View precise location of 51.136.66.254 on the map!
51.136.66.240	View precise location of 51.136.66.240 on the map!
51.136.66.24	View precise location of 51.136.66.24 on the map!
51.136.66.69	View precise location of 51.136.66.69 on the map!
51.136.66.153	View precise location of 51.136.66.153 on the map!
51.136.66.246	View precise location of 51.136.66.246 on the map!
51.136.66.241	View precise location of 51.136.66.241 on the map!
51.136.66.48	View precise location of 51.136.66.48 on the map!
51.136.66.53	View precise location of 51.136.66.53 on the map!
51.136.66.64	View precise location of 51.136.66.64 on the map!

10 Random IPs

8.51.150.91	Find precise map location of 8.51.150.91
56.241.208.79	Find precise map location of 56.241.208.79
206.114.61.166	Find precise map location of 206.114.61.166
142.203.120.105	Find precise map location of 142.203.120.105
93.108.32.141	Find precise map location of 93.108.32.141
111.153.43.148	Find precise map location of 111.153.43.148
95.88.50.161	Find precise map location of 95.88.50.161
90.193.214.184	Find precise map location of 90.193.214.184
32.181.38.30	Find precise map location of 32.181.38.30
179.206.96.112	Find precise map location of 179.206.96.112
111.132.37.210	Find precise map location of 111.132.37.210

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