221.21.197 is a class C of IPs

Sample IPs from the class C 221.21.197

221.21.197.145	View precise location of 221.21.197.145 on the map!
221.21.197.194	View precise location of 221.21.197.194 on the map!
221.21.197.178	View precise location of 221.21.197.178 on the map!
221.21.197.86	View precise location of 221.21.197.86 on the map!
221.21.197.100	View precise location of 221.21.197.100 on the map!
221.21.197.86	View precise location of 221.21.197.86 on the map!
221.21.197.47	View precise location of 221.21.197.47 on the map!
221.21.197.236	View precise location of 221.21.197.236 on the map!
221.21.197.107	View precise location of 221.21.197.107 on the map!
221.21.197.31	View precise location of 221.21.197.31 on the map!
221.21.197.24	View precise location of 221.21.197.24 on the map!

10 Random IPs

170.128.20.59	Find precise map location of 170.128.20.59
149.167.183.21	Find precise map location of 149.167.183.21
84.74.116.194	Find precise map location of 84.74.116.194
52.34.238.120	Find precise map location of 52.34.238.120
193.198.179.75	Find precise map location of 193.198.179.75
187.87.34.181	Find precise map location of 187.87.34.181
185.196.162.189	Find precise map location of 185.196.162.189
65.213.206.9	Find precise map location of 65.213.206.9
75.176.246.147	Find precise map location of 75.176.246.147
229.243.52.223	Find precise map location of 229.243.52.223
40.22.65.32	Find precise map location of 40.22.65.32

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