221.243.143 is a class C of IPs

Sample IPs from the class C 221.243.143

221.243.143.21	View precise location of 221.243.143.21 on the map!
221.243.143.58	View precise location of 221.243.143.58 on the map!
221.243.143.78	View precise location of 221.243.143.78 on the map!
221.243.143.45	View precise location of 221.243.143.45 on the map!
221.243.143.251	View precise location of 221.243.143.251 on the map!
221.243.143.135	View precise location of 221.243.143.135 on the map!
221.243.143.254	View precise location of 221.243.143.254 on the map!
221.243.143.38	View precise location of 221.243.143.38 on the map!
221.243.143.242	View precise location of 221.243.143.242 on the map!
221.243.143.186	View precise location of 221.243.143.186 on the map!
221.243.143.10	View precise location of 221.243.143.10 on the map!

10 Random IPs

91.51.47.98	Find precise map location of 91.51.47.98
134.85.56.164	Find precise map location of 134.85.56.164
46.80.229.23	Find precise map location of 46.80.229.23
216.40.241.181	Find precise map location of 216.40.241.181
247.101.168.146	Find precise map location of 247.101.168.146
73.174.130.119	Find precise map location of 73.174.130.119
59.172.141.232	Find precise map location of 59.172.141.232
2.25.33.81	Find precise map location of 2.25.33.81
19.32.115.128	Find precise map location of 19.32.115.128
131.152.73.172	Find precise map location of 131.152.73.172
158.3.247.113	Find precise map location of 158.3.247.113

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