121.81.43 is a class C of IPs

Sample IPs from the class C 121.81.43

121.81.43.178	View precise location of 121.81.43.178 on the map!
121.81.43.79	View precise location of 121.81.43.79 on the map!
121.81.43.103	View precise location of 121.81.43.103 on the map!
121.81.43.112	View precise location of 121.81.43.112 on the map!
121.81.43.250	View precise location of 121.81.43.250 on the map!
121.81.43.253	View precise location of 121.81.43.253 on the map!
121.81.43.17	View precise location of 121.81.43.17 on the map!
121.81.43.200	View precise location of 121.81.43.200 on the map!
121.81.43.39	View precise location of 121.81.43.39 on the map!
121.81.43.33	View precise location of 121.81.43.33 on the map!
121.81.43.98	View precise location of 121.81.43.98 on the map!

10 Random IPs

198.157.125.212	Find precise map location of 198.157.125.212
208.249.217.141	Find precise map location of 208.249.217.141
127.229.213.217	Find precise map location of 127.229.213.217
122.186.153.184	Find precise map location of 122.186.153.184
78.141.195.145	Find precise map location of 78.141.195.145
223.3.154.94	Find precise map location of 223.3.154.94
146.139.206.91	Find precise map location of 146.139.206.91
155.233.98.234	Find precise map location of 155.233.98.234
147.55.57.184	Find precise map location of 147.55.57.184
156.63.161.119	Find precise map location of 156.63.161.119
97.240.210.11	Find precise map location of 97.240.210.11

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