121.153.103 is a class C of IPs

Sample IPs from the class C 121.153.103

121.153.103.243	View precise location of 121.153.103.243 on the map!
121.153.103.34	View precise location of 121.153.103.34 on the map!
121.153.103.198	View precise location of 121.153.103.198 on the map!
121.153.103.115	View precise location of 121.153.103.115 on the map!
121.153.103.211	View precise location of 121.153.103.211 on the map!
121.153.103.96	View precise location of 121.153.103.96 on the map!
121.153.103.131	View precise location of 121.153.103.131 on the map!
121.153.103.207	View precise location of 121.153.103.207 on the map!
121.153.103.210	View precise location of 121.153.103.210 on the map!
121.153.103.135	View precise location of 121.153.103.135 on the map!
121.153.103.4	View precise location of 121.153.103.4 on the map!

10 Random IPs

127.149.29.206	Find precise map location of 127.149.29.206
171.95.33.164	Find precise map location of 171.95.33.164
227.15.51.215	Find precise map location of 227.15.51.215
140.157.90.169	Find precise map location of 140.157.90.169
146.203.29.178	Find precise map location of 146.203.29.178
242.30.224.102	Find precise map location of 242.30.224.102
3.216.139.81	Find precise map location of 3.216.139.81
205.179.120.68	Find precise map location of 205.179.120.68
118.144.40.33	Find precise map location of 118.144.40.33
139.225.87.195	Find precise map location of 139.225.87.195
249.97.21.176	Find precise map location of 249.97.21.176

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