21.107.212 is a class C of IPs

Sample IPs from the class C 21.107.212

21.107.212.150	View precise location of 21.107.212.150 on the map!
21.107.212.162	View precise location of 21.107.212.162 on the map!
21.107.212.82	View precise location of 21.107.212.82 on the map!
21.107.212.19	View precise location of 21.107.212.19 on the map!
21.107.212.148	View precise location of 21.107.212.148 on the map!
21.107.212.125	View precise location of 21.107.212.125 on the map!
21.107.212.135	View precise location of 21.107.212.135 on the map!
21.107.212.78	View precise location of 21.107.212.78 on the map!
21.107.212.65	View precise location of 21.107.212.65 on the map!
21.107.212.7	View precise location of 21.107.212.7 on the map!
21.107.212.90	View precise location of 21.107.212.90 on the map!

10 Random IPs

240.34.231.200	Find precise map location of 240.34.231.200
121.255.122.140	Find precise map location of 121.255.122.140
114.94.129.44	Find precise map location of 114.94.129.44
215.187.147.59	Find precise map location of 215.187.147.59
81.88.93.251	Find precise map location of 81.88.93.251
162.146.248.67	Find precise map location of 162.146.248.67
72.174.237.24	Find precise map location of 72.174.237.24
233.224.151.71	Find precise map location of 233.224.151.71
218.181.211.55	Find precise map location of 218.181.211.55
137.27.222.152	Find precise map location of 137.27.222.152
175.123.87.63	Find precise map location of 175.123.87.63

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