21.83.72 is a class C of IPs

Sample IPs from the class C 21.83.72

21.83.72.104	View precise location of 21.83.72.104 on the map!
21.83.72.37	View precise location of 21.83.72.37 on the map!
21.83.72.17	View precise location of 21.83.72.17 on the map!
21.83.72.103	View precise location of 21.83.72.103 on the map!
21.83.72.149	View precise location of 21.83.72.149 on the map!
21.83.72.214	View precise location of 21.83.72.214 on the map!
21.83.72.79	View precise location of 21.83.72.79 on the map!
21.83.72.93	View precise location of 21.83.72.93 on the map!
21.83.72.103	View precise location of 21.83.72.103 on the map!
21.83.72.76	View precise location of 21.83.72.76 on the map!
21.83.72.230	View precise location of 21.83.72.230 on the map!

10 Random IPs

226.179.151.144	Find precise map location of 226.179.151.144
107.21.127.232	Find precise map location of 107.21.127.232
201.193.92.85	Find precise map location of 201.193.92.85
72.78.119.40	Find precise map location of 72.78.119.40
14.102.198.208	Find precise map location of 14.102.198.208
80.32.50.194	Find precise map location of 80.32.50.194
150.53.165.62	Find precise map location of 150.53.165.62
234.179.50.149	Find precise map location of 234.179.50.149
64.34.246.187	Find precise map location of 64.34.246.187
51.1.119.121	Find precise map location of 51.1.119.121
107.124.194.110	Find precise map location of 107.124.194.110

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