51.5.213 is a class C of IPs

Sample IPs from the class C 51.5.213

51.5.213.232	View precise location of 51.5.213.232 on the map!
51.5.213.25	View precise location of 51.5.213.25 on the map!
51.5.213.102	View precise location of 51.5.213.102 on the map!
51.5.213.92	View precise location of 51.5.213.92 on the map!
51.5.213.178	View precise location of 51.5.213.178 on the map!
51.5.213.25	View precise location of 51.5.213.25 on the map!
51.5.213.191	View precise location of 51.5.213.191 on the map!
51.5.213.98	View precise location of 51.5.213.98 on the map!
51.5.213.230	View precise location of 51.5.213.230 on the map!
51.5.213.3	View precise location of 51.5.213.3 on the map!
51.5.213.172	View precise location of 51.5.213.172 on the map!

10 Random IPs

247.176.133.177	Find precise map location of 247.176.133.177
87.52.7.108	Find precise map location of 87.52.7.108
32.116.130.219	Find precise map location of 32.116.130.219
33.84.174.96	Find precise map location of 33.84.174.96
53.35.142.164	Find precise map location of 53.35.142.164
2.99.47.148	Find precise map location of 2.99.47.148
222.139.70.207	Find precise map location of 222.139.70.207
23.217.59.40	Find precise map location of 23.217.59.40
118.201.102.235	Find precise map location of 118.201.102.235
252.35.2.243	Find precise map location of 252.35.2.243
250.224.235.207	Find precise map location of 250.224.235.207

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