121.230.172 is a class C of IPs

Sample IPs from the class C 121.230.172

121.230.172.185	View precise location of 121.230.172.185 on the map!
121.230.172.33	View precise location of 121.230.172.33 on the map!
121.230.172.142	View precise location of 121.230.172.142 on the map!
121.230.172.24	View precise location of 121.230.172.24 on the map!
121.230.172.205	View precise location of 121.230.172.205 on the map!
121.230.172.249	View precise location of 121.230.172.249 on the map!
121.230.172.183	View precise location of 121.230.172.183 on the map!
121.230.172.199	View precise location of 121.230.172.199 on the map!
121.230.172.129	View precise location of 121.230.172.129 on the map!
121.230.172.22	View precise location of 121.230.172.22 on the map!
121.230.172.44	View precise location of 121.230.172.44 on the map!

10 Random IPs

187.161.55.147	Find precise map location of 187.161.55.147
226.37.98.108	Find precise map location of 226.37.98.108
176.35.116.171	Find precise map location of 176.35.116.171
11.25.140.158	Find precise map location of 11.25.140.158
22.73.175.186	Find precise map location of 22.73.175.186
172.32.230.205	Find precise map location of 172.32.230.205
214.129.103.27	Find precise map location of 214.129.103.27
221.196.69.71	Find precise map location of 221.196.69.71
116.154.113.192	Find precise map location of 116.154.113.192
115.98.144.198	Find precise map location of 115.98.144.198
26.155.69.71	Find precise map location of 26.155.69.71

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