21.112.4 is a class C of IPs

Sample IPs from the class C 21.112.4

21.112.4.215	View precise location of 21.112.4.215 on the map!
21.112.4.65	View precise location of 21.112.4.65 on the map!
21.112.4.93	View precise location of 21.112.4.93 on the map!
21.112.4.119	View precise location of 21.112.4.119 on the map!
21.112.4.19	View precise location of 21.112.4.19 on the map!
21.112.4.142	View precise location of 21.112.4.142 on the map!
21.112.4.172	View precise location of 21.112.4.172 on the map!
21.112.4.118	View precise location of 21.112.4.118 on the map!
21.112.4.38	View precise location of 21.112.4.38 on the map!
21.112.4.135	View precise location of 21.112.4.135 on the map!
21.112.4.30	View precise location of 21.112.4.30 on the map!

10 Random IPs

78.1.23.19	Find precise map location of 78.1.23.19
187.168.67.215	Find precise map location of 187.168.67.215
239.121.154.141	Find precise map location of 239.121.154.141
206.227.123.5	Find precise map location of 206.227.123.5
206.213.187.218	Find precise map location of 206.213.187.218
153.145.145.232	Find precise map location of 153.145.145.232
187.206.255.57	Find precise map location of 187.206.255.57
1.97.187.97	Find precise map location of 1.97.187.97
64.65.39.199	Find precise map location of 64.65.39.199
235.111.246.191	Find precise map location of 235.111.246.191
81.28.67.230	Find precise map location of 81.28.67.230

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