216.4.221 is a class C of IPs

Sample IPs from the class C 216.4.221

216.4.221.139	View precise location of 216.4.221.139 on the map!
216.4.221.5	View precise location of 216.4.221.5 on the map!
216.4.221.121	View precise location of 216.4.221.121 on the map!
216.4.221.19	View precise location of 216.4.221.19 on the map!
216.4.221.21	View precise location of 216.4.221.21 on the map!
216.4.221.40	View precise location of 216.4.221.40 on the map!
216.4.221.15	View precise location of 216.4.221.15 on the map!
216.4.221.58	View precise location of 216.4.221.58 on the map!
216.4.221.155	View precise location of 216.4.221.155 on the map!
216.4.221.188	View precise location of 216.4.221.188 on the map!
216.4.221.69	View precise location of 216.4.221.69 on the map!

10 Random IPs

210.54.94.86	Find precise map location of 210.54.94.86
216.2.3.127	Find precise map location of 216.2.3.127
60.72.150.239	Find precise map location of 60.72.150.239
110.204.136.71	Find precise map location of 110.204.136.71
245.96.122.186	Find precise map location of 245.96.122.186
80.117.97.211	Find precise map location of 80.117.97.211
117.240.188.87	Find precise map location of 117.240.188.87
162.113.45.219	Find precise map location of 162.113.45.219
34.27.54.45	Find precise map location of 34.27.54.45
183.225.191.120	Find precise map location of 183.225.191.120
138.26.221.97	Find precise map location of 138.26.221.97

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