13.239.4 is a class C of IPs

Sample IPs from the class C 13.239.4

13.239.4.80	View precise location of 13.239.4.80 on the map!
13.239.4.97	View precise location of 13.239.4.97 on the map!
13.239.4.58	View precise location of 13.239.4.58 on the map!
13.239.4.132	View precise location of 13.239.4.132 on the map!
13.239.4.237	View precise location of 13.239.4.237 on the map!
13.239.4.79	View precise location of 13.239.4.79 on the map!
13.239.4.206	View precise location of 13.239.4.206 on the map!
13.239.4.147	View precise location of 13.239.4.147 on the map!
13.239.4.10	View precise location of 13.239.4.10 on the map!
13.239.4.22	View precise location of 13.239.4.22 on the map!
13.239.4.187	View precise location of 13.239.4.187 on the map!

10 Random IPs

129.92.141.178	Find precise map location of 129.92.141.178
254.96.131.80	Find precise map location of 254.96.131.80
144.254.248.154	Find precise map location of 144.254.248.154
151.61.181.88	Find precise map location of 151.61.181.88
165.192.178.214	Find precise map location of 165.192.178.214
88.109.116.101	Find precise map location of 88.109.116.101
71.39.87.165	Find precise map location of 71.39.87.165
84.215.165.40	Find precise map location of 84.215.165.40
159.195.203.200	Find precise map location of 159.195.203.200
194.87.199.225	Find precise map location of 194.87.199.225
130.164.224.103	Find precise map location of 130.164.224.103

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