21.138.115 is a class C of IPs

Sample IPs from the class C 21.138.115

21.138.115.104	View precise location of 21.138.115.104 on the map!
21.138.115.199	View precise location of 21.138.115.199 on the map!
21.138.115.87	View precise location of 21.138.115.87 on the map!
21.138.115.166	View precise location of 21.138.115.166 on the map!
21.138.115.225	View precise location of 21.138.115.225 on the map!
21.138.115.140	View precise location of 21.138.115.140 on the map!
21.138.115.73	View precise location of 21.138.115.73 on the map!
21.138.115.93	View precise location of 21.138.115.93 on the map!
21.138.115.79	View precise location of 21.138.115.79 on the map!
21.138.115.188	View precise location of 21.138.115.188 on the map!
21.138.115.221	View precise location of 21.138.115.221 on the map!

10 Random IPs

68.87.233.175	Find precise map location of 68.87.233.175
128.55.26.143	Find precise map location of 128.55.26.143
180.214.3.24	Find precise map location of 180.214.3.24
15.118.39.220	Find precise map location of 15.118.39.220
239.69.241.164	Find precise map location of 239.69.241.164
38.115.78.5	Find precise map location of 38.115.78.5
109.110.65.240	Find precise map location of 109.110.65.240
54.110.238.171	Find precise map location of 54.110.238.171
186.251.249.68	Find precise map location of 186.251.249.68
88.230.135.26	Find precise map location of 88.230.135.26
183.189.70.13	Find precise map location of 183.189.70.13

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