21.120.221 is a class C of IPs

Sample IPs from the class C 21.120.221

21.120.221.23	View precise location of 21.120.221.23 on the map!
21.120.221.229	View precise location of 21.120.221.229 on the map!
21.120.221.94	View precise location of 21.120.221.94 on the map!
21.120.221.28	View precise location of 21.120.221.28 on the map!
21.120.221.178	View precise location of 21.120.221.178 on the map!
21.120.221.54	View precise location of 21.120.221.54 on the map!
21.120.221.188	View precise location of 21.120.221.188 on the map!
21.120.221.103	View precise location of 21.120.221.103 on the map!
21.120.221.3	View precise location of 21.120.221.3 on the map!
21.120.221.125	View precise location of 21.120.221.125 on the map!
21.120.221.175	View precise location of 21.120.221.175 on the map!

10 Random IPs

241.228.41.36	Find precise map location of 241.228.41.36
144.5.245.79	Find precise map location of 144.5.245.79
184.141.241.136	Find precise map location of 184.141.241.136
28.180.4.110	Find precise map location of 28.180.4.110
43.133.113.90	Find precise map location of 43.133.113.90
244.111.133.235	Find precise map location of 244.111.133.235
118.29.232.53	Find precise map location of 118.29.232.53
102.240.96.51	Find precise map location of 102.240.96.51
244.179.134.79	Find precise map location of 244.179.134.79
202.133.36.173	Find precise map location of 202.133.36.173
3.63.59.197	Find precise map location of 3.63.59.197

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