121.154.212 is a class C of IPs

Sample IPs from the class C 121.154.212

121.154.212.48	View precise location of 121.154.212.48 on the map!
121.154.212.204	View precise location of 121.154.212.204 on the map!
121.154.212.247	View precise location of 121.154.212.247 on the map!
121.154.212.57	View precise location of 121.154.212.57 on the map!
121.154.212.173	View precise location of 121.154.212.173 on the map!
121.154.212.17	View precise location of 121.154.212.17 on the map!
121.154.212.228	View precise location of 121.154.212.228 on the map!
121.154.212.71	View precise location of 121.154.212.71 on the map!
121.154.212.130	View precise location of 121.154.212.130 on the map!
121.154.212.79	View precise location of 121.154.212.79 on the map!
121.154.212.153	View precise location of 121.154.212.153 on the map!

10 Random IPs

47.220.163.110	Find precise map location of 47.220.163.110
167.104.89.5	Find precise map location of 167.104.89.5
30.71.1.67	Find precise map location of 30.71.1.67
179.180.132.42	Find precise map location of 179.180.132.42
249.12.98.204	Find precise map location of 249.12.98.204
39.215.74.231	Find precise map location of 39.215.74.231
13.183.132.176	Find precise map location of 13.183.132.176
123.118.196.73	Find precise map location of 123.118.196.73
112.251.194.192	Find precise map location of 112.251.194.192
138.18.156.68	Find precise map location of 138.18.156.68
32.33.207.208	Find precise map location of 32.33.207.208

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