172.51.172 is a class C of IPs

Sample IPs from the class C 172.51.172

172.51.172.1	View precise location of 172.51.172.1 on the map!
172.51.172.167	View precise location of 172.51.172.167 on the map!
172.51.172.95	View precise location of 172.51.172.95 on the map!
172.51.172.21	View precise location of 172.51.172.21 on the map!
172.51.172.240	View precise location of 172.51.172.240 on the map!
172.51.172.173	View precise location of 172.51.172.173 on the map!
172.51.172.22	View precise location of 172.51.172.22 on the map!
172.51.172.43	View precise location of 172.51.172.43 on the map!
172.51.172.151	View precise location of 172.51.172.151 on the map!
172.51.172.157	View precise location of 172.51.172.157 on the map!
172.51.172.59	View precise location of 172.51.172.59 on the map!

10 Random IPs

208.9.174.55	Find precise map location of 208.9.174.55
126.145.184.195	Find precise map location of 126.145.184.195
140.102.194.94	Find precise map location of 140.102.194.94
236.77.51.37	Find precise map location of 236.77.51.37
227.243.182.114	Find precise map location of 227.243.182.114
84.136.124.188	Find precise map location of 84.136.124.188
138.85.239.18	Find precise map location of 138.85.239.18
182.35.164.251	Find precise map location of 182.35.164.251
228.87.41.110	Find precise map location of 228.87.41.110
113.214.50.186	Find precise map location of 113.214.50.186
204.88.192.35	Find precise map location of 204.88.192.35

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