21.216.204 is a class C of IPs

Sample IPs from the class C 21.216.204

21.216.204.64	View precise location of 21.216.204.64 on the map!
21.216.204.36	View precise location of 21.216.204.36 on the map!
21.216.204.55	View precise location of 21.216.204.55 on the map!
21.216.204.67	View precise location of 21.216.204.67 on the map!
21.216.204.248	View precise location of 21.216.204.248 on the map!
21.216.204.167	View precise location of 21.216.204.167 on the map!
21.216.204.105	View precise location of 21.216.204.105 on the map!
21.216.204.138	View precise location of 21.216.204.138 on the map!
21.216.204.60	View precise location of 21.216.204.60 on the map!
21.216.204.254	View precise location of 21.216.204.254 on the map!
21.216.204.247	View precise location of 21.216.204.247 on the map!

10 Random IPs

226.198.229.62	Find precise map location of 226.198.229.62
142.186.43.24	Find precise map location of 142.186.43.24
171.128.141.201	Find precise map location of 171.128.141.201
140.100.24.148	Find precise map location of 140.100.24.148
244.24.232.194	Find precise map location of 244.24.232.194
124.167.77.59	Find precise map location of 124.167.77.59
7.221.86.87	Find precise map location of 7.221.86.87
205.57.93.199	Find precise map location of 205.57.93.199
116.208.163.251	Find precise map location of 116.208.163.251
168.246.241.145	Find precise map location of 168.246.241.145
85.32.57.101	Find precise map location of 85.32.57.101

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