121.251.71 is a class C of IPs

Sample IPs from the class C 121.251.71

121.251.71.218	View precise location of 121.251.71.218 on the map!
121.251.71.178	View precise location of 121.251.71.178 on the map!
121.251.71.78	View precise location of 121.251.71.78 on the map!
121.251.71.207	View precise location of 121.251.71.207 on the map!
121.251.71.105	View precise location of 121.251.71.105 on the map!
121.251.71.154	View precise location of 121.251.71.154 on the map!
121.251.71.230	View precise location of 121.251.71.230 on the map!
121.251.71.118	View precise location of 121.251.71.118 on the map!
121.251.71.136	View precise location of 121.251.71.136 on the map!
121.251.71.62	View precise location of 121.251.71.62 on the map!
121.251.71.47	View precise location of 121.251.71.47 on the map!

10 Random IPs

138.245.60.103	Find precise map location of 138.245.60.103
139.68.142.141	Find precise map location of 139.68.142.141
180.82.158.81	Find precise map location of 180.82.158.81
42.66.165.221	Find precise map location of 42.66.165.221
197.239.74.79	Find precise map location of 197.239.74.79
107.152.1.141	Find precise map location of 107.152.1.141
102.177.92.186	Find precise map location of 102.177.92.186
35.188.91.90	Find precise map location of 35.188.91.90
233.40.31.48	Find precise map location of 233.40.31.48
139.208.29.116	Find precise map location of 139.208.29.116
230.219.128.65	Find precise map location of 230.219.128.65

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