128.81.216 is a class C of IPs

Sample IPs from the class C 128.81.216

128.81.216.5	View precise location of 128.81.216.5 on the map!
128.81.216.200	View precise location of 128.81.216.200 on the map!
128.81.216.70	View precise location of 128.81.216.70 on the map!
128.81.216.58	View precise location of 128.81.216.58 on the map!
128.81.216.222	View precise location of 128.81.216.222 on the map!
128.81.216.96	View precise location of 128.81.216.96 on the map!
128.81.216.21	View precise location of 128.81.216.21 on the map!
128.81.216.81	View precise location of 128.81.216.81 on the map!
128.81.216.182	View precise location of 128.81.216.182 on the map!
128.81.216.55	View precise location of 128.81.216.55 on the map!
128.81.216.21	View precise location of 128.81.216.21 on the map!

10 Random IPs

108.42.83.58	Find precise map location of 108.42.83.58
21.200.60.165	Find precise map location of 21.200.60.165
246.63.230.197	Find precise map location of 246.63.230.197
212.215.217.61	Find precise map location of 212.215.217.61
83.72.90.169	Find precise map location of 83.72.90.169
245.223.170.236	Find precise map location of 245.223.170.236
226.18.73.187	Find precise map location of 226.18.73.187
54.141.13.168	Find precise map location of 54.141.13.168
37.95.235.110	Find precise map location of 37.95.235.110
106.6.2.177	Find precise map location of 106.6.2.177
29.179.135.137	Find precise map location of 29.179.135.137

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