121.204.40 is a class C of IPs

Sample IPs from the class C 121.204.40

121.204.40.148	View precise location of 121.204.40.148 on the map!
121.204.40.3	View precise location of 121.204.40.3 on the map!
121.204.40.60	View precise location of 121.204.40.60 on the map!
121.204.40.35	View precise location of 121.204.40.35 on the map!
121.204.40.12	View precise location of 121.204.40.12 on the map!
121.204.40.161	View precise location of 121.204.40.161 on the map!
121.204.40.19	View precise location of 121.204.40.19 on the map!
121.204.40.253	View precise location of 121.204.40.253 on the map!
121.204.40.64	View precise location of 121.204.40.64 on the map!
121.204.40.171	View precise location of 121.204.40.171 on the map!
121.204.40.157	View precise location of 121.204.40.157 on the map!

10 Random IPs

199.142.144.134	Find precise map location of 199.142.144.134
87.122.132.210	Find precise map location of 87.122.132.210
211.77.54.81	Find precise map location of 211.77.54.81
237.7.98.109	Find precise map location of 237.7.98.109
7.102.152.158	Find precise map location of 7.102.152.158
214.112.94.182	Find precise map location of 214.112.94.182
33.111.132.108	Find precise map location of 33.111.132.108
249.212.133.254	Find precise map location of 249.212.133.254
175.207.169.190	Find precise map location of 175.207.169.190
255.186.48.124	Find precise map location of 255.186.48.124
206.211.157.209	Find precise map location of 206.211.157.209

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