216.104.21 is a class C of IPs

Sample IPs from the class C 216.104.21

216.104.21.175	View precise location of 216.104.21.175 on the map!
216.104.21.166	View precise location of 216.104.21.166 on the map!
216.104.21.240	View precise location of 216.104.21.240 on the map!
216.104.21.60	View precise location of 216.104.21.60 on the map!
216.104.21.210	View precise location of 216.104.21.210 on the map!
216.104.21.211	View precise location of 216.104.21.211 on the map!
216.104.21.174	View precise location of 216.104.21.174 on the map!
216.104.21.48	View precise location of 216.104.21.48 on the map!
216.104.21.225	View precise location of 216.104.21.225 on the map!
216.104.21.124	View precise location of 216.104.21.124 on the map!
216.104.21.176	View precise location of 216.104.21.176 on the map!

10 Random IPs

73.22.178.129	Find precise map location of 73.22.178.129
56.17.104.109	Find precise map location of 56.17.104.109
211.84.166.182	Find precise map location of 211.84.166.182
238.170.74.168	Find precise map location of 238.170.74.168
127.65.196.57	Find precise map location of 127.65.196.57
10.123.77.143	Find precise map location of 10.123.77.143
89.196.49.171	Find precise map location of 89.196.49.171
147.72.189.157	Find precise map location of 147.72.189.157
191.11.24.51	Find precise map location of 191.11.24.51
66.123.126.92	Find precise map location of 66.123.126.92
189.195.228.69	Find precise map location of 189.195.228.69

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