216.21.216 is a class C of IPs

Sample IPs from the class C 216.21.216

216.21.216.73	View precise location of 216.21.216.73 on the map!
216.21.216.11	View precise location of 216.21.216.11 on the map!
216.21.216.236	View precise location of 216.21.216.236 on the map!
216.21.216.112	View precise location of 216.21.216.112 on the map!
216.21.216.195	View precise location of 216.21.216.195 on the map!
216.21.216.106	View precise location of 216.21.216.106 on the map!
216.21.216.81	View precise location of 216.21.216.81 on the map!
216.21.216.217	View precise location of 216.21.216.217 on the map!
216.21.216.114	View precise location of 216.21.216.114 on the map!
216.21.216.71	View precise location of 216.21.216.71 on the map!
216.21.216.44	View precise location of 216.21.216.44 on the map!

10 Random IPs

51.136.79.4	Find precise map location of 51.136.79.4
103.43.45.146	Find precise map location of 103.43.45.146
187.123.55.106	Find precise map location of 187.123.55.106
20.117.203.231	Find precise map location of 20.117.203.231
174.226.10.6	Find precise map location of 174.226.10.6
249.210.27.9	Find precise map location of 249.210.27.9
156.151.82.224	Find precise map location of 156.151.82.224
120.85.134.14	Find precise map location of 120.85.134.14
205.252.44.236	Find precise map location of 205.252.44.236
135.132.152.57	Find precise map location of 135.132.152.57
180.73.154.92	Find precise map location of 180.73.154.92

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