51.90.16 is a class C of IPs

Sample IPs from the class C 51.90.16

51.90.16.32	View precise location of 51.90.16.32 on the map!
51.90.16.6	View precise location of 51.90.16.6 on the map!
51.90.16.251	View precise location of 51.90.16.251 on the map!
51.90.16.158	View precise location of 51.90.16.158 on the map!
51.90.16.209	View precise location of 51.90.16.209 on the map!
51.90.16.230	View precise location of 51.90.16.230 on the map!
51.90.16.175	View precise location of 51.90.16.175 on the map!
51.90.16.56	View precise location of 51.90.16.56 on the map!
51.90.16.133	View precise location of 51.90.16.133 on the map!
51.90.16.87	View precise location of 51.90.16.87 on the map!
51.90.16.248	View precise location of 51.90.16.248 on the map!

10 Random IPs

42.248.110.250	Find precise map location of 42.248.110.250
101.84.128.117	Find precise map location of 101.84.128.117
234.125.137.214	Find precise map location of 234.125.137.214
92.104.89.217	Find precise map location of 92.104.89.217
10.154.8.15	Find precise map location of 10.154.8.15
62.129.108.103	Find precise map location of 62.129.108.103
87.204.230.229	Find precise map location of 87.204.230.229
1.81.179.226	Find precise map location of 1.81.179.226
181.46.251.204	Find precise map location of 181.46.251.204
134.63.162.123	Find precise map location of 134.63.162.123
31.240.34.90	Find precise map location of 31.240.34.90

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