15.83.42 is a class C of IPs

Sample IPs from the class C 15.83.42

15.83.42.151	View precise location of 15.83.42.151 on the map!
15.83.42.159	View precise location of 15.83.42.159 on the map!
15.83.42.5	View precise location of 15.83.42.5 on the map!
15.83.42.2	View precise location of 15.83.42.2 on the map!
15.83.42.18	View precise location of 15.83.42.18 on the map!
15.83.42.129	View precise location of 15.83.42.129 on the map!
15.83.42.212	View precise location of 15.83.42.212 on the map!
15.83.42.185	View precise location of 15.83.42.185 on the map!
15.83.42.33	View precise location of 15.83.42.33 on the map!
15.83.42.131	View precise location of 15.83.42.131 on the map!
15.83.42.189	View precise location of 15.83.42.189 on the map!

10 Random IPs

171.180.226.240	Find precise map location of 171.180.226.240
15.39.97.234	Find precise map location of 15.39.97.234
196.54.123.114	Find precise map location of 196.54.123.114
47.235.99.92	Find precise map location of 47.235.99.92
120.27.194.12	Find precise map location of 120.27.194.12
221.73.249.177	Find precise map location of 221.73.249.177
5.4.215.163	Find precise map location of 5.4.215.163
255.130.62.228	Find precise map location of 255.130.62.228
205.193.147.133	Find precise map location of 205.193.147.133
236.203.207.93	Find precise map location of 236.203.207.93
152.49.71.59	Find precise map location of 152.49.71.59

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