21.83.16 is a class C of IPs

Sample IPs from the class C 21.83.16

21.83.16.31	View precise location of 21.83.16.31 on the map!
21.83.16.188	View precise location of 21.83.16.188 on the map!
21.83.16.169	View precise location of 21.83.16.169 on the map!
21.83.16.46	View precise location of 21.83.16.46 on the map!
21.83.16.163	View precise location of 21.83.16.163 on the map!
21.83.16.60	View precise location of 21.83.16.60 on the map!
21.83.16.57	View precise location of 21.83.16.57 on the map!
21.83.16.119	View precise location of 21.83.16.119 on the map!
21.83.16.61	View precise location of 21.83.16.61 on the map!
21.83.16.91	View precise location of 21.83.16.91 on the map!
21.83.16.6	View precise location of 21.83.16.6 on the map!

10 Random IPs

236.91.148.210	Find precise map location of 236.91.148.210
250.25.193.42	Find precise map location of 250.25.193.42
248.120.97.163	Find precise map location of 248.120.97.163
37.119.198.209	Find precise map location of 37.119.198.209
77.117.158.182	Find precise map location of 77.117.158.182
169.112.31.180	Find precise map location of 169.112.31.180
13.94.11.7	Find precise map location of 13.94.11.7
236.207.139.135	Find precise map location of 236.207.139.135
192.100.187.118	Find precise map location of 192.100.187.118
142.32.90.218	Find precise map location of 142.32.90.218
220.117.4.148	Find precise map location of 220.117.4.148

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