239.163.21 is a class C of IPs

Sample IPs from the class C 239.163.21

239.163.21.234	View precise location of 239.163.21.234 on the map!
239.163.21.139	View precise location of 239.163.21.139 on the map!
239.163.21.138	View precise location of 239.163.21.138 on the map!
239.163.21.162	View precise location of 239.163.21.162 on the map!
239.163.21.232	View precise location of 239.163.21.232 on the map!
239.163.21.33	View precise location of 239.163.21.33 on the map!
239.163.21.186	View precise location of 239.163.21.186 on the map!
239.163.21.128	View precise location of 239.163.21.128 on the map!
239.163.21.237	View precise location of 239.163.21.237 on the map!
239.163.21.159	View precise location of 239.163.21.159 on the map!
239.163.21.171	View precise location of 239.163.21.171 on the map!

10 Random IPs

40.104.60.149	Find precise map location of 40.104.60.149
216.186.191.51	Find precise map location of 216.186.191.51
150.40.114.74	Find precise map location of 150.40.114.74
199.73.65.108	Find precise map location of 199.73.65.108
151.69.224.31	Find precise map location of 151.69.224.31
211.92.163.163	Find precise map location of 211.92.163.163
130.74.60.186	Find precise map location of 130.74.60.186
125.170.89.244	Find precise map location of 125.170.89.244
2.83.81.36	Find precise map location of 2.83.81.36
75.58.67.70	Find precise map location of 75.58.67.70
196.153.107.213	Find precise map location of 196.153.107.213

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