51.172.52 is a class C of IPs

Sample IPs from the class C 51.172.52

51.172.52.189	View precise location of 51.172.52.189 on the map!
51.172.52.241	View precise location of 51.172.52.241 on the map!
51.172.52.15	View precise location of 51.172.52.15 on the map!
51.172.52.13	View precise location of 51.172.52.13 on the map!
51.172.52.38	View precise location of 51.172.52.38 on the map!
51.172.52.110	View precise location of 51.172.52.110 on the map!
51.172.52.69	View precise location of 51.172.52.69 on the map!
51.172.52.74	View precise location of 51.172.52.74 on the map!
51.172.52.159	View precise location of 51.172.52.159 on the map!
51.172.52.169	View precise location of 51.172.52.169 on the map!
51.172.52.129	View precise location of 51.172.52.129 on the map!

10 Random IPs

72.125.192.154	Find precise map location of 72.125.192.154
153.205.208.133	Find precise map location of 153.205.208.133
143.61.239.21	Find precise map location of 143.61.239.21
26.105.122.65	Find precise map location of 26.105.122.65
17.37.137.106	Find precise map location of 17.37.137.106
122.56.221.240	Find precise map location of 122.56.221.240
231.78.49.12	Find precise map location of 231.78.49.12
76.151.249.186	Find precise map location of 76.151.249.186
58.146.136.145	Find precise map location of 58.146.136.145
60.236.246.79	Find precise map location of 60.236.246.79
177.52.164.153	Find precise map location of 177.52.164.153

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