121.108.221 is a class C of IPs

Sample IPs from the class C 121.108.221

121.108.221.234	View precise location of 121.108.221.234 on the map!
121.108.221.114	View precise location of 121.108.221.114 on the map!
121.108.221.191	View precise location of 121.108.221.191 on the map!
121.108.221.112	View precise location of 121.108.221.112 on the map!
121.108.221.56	View precise location of 121.108.221.56 on the map!
121.108.221.11	View precise location of 121.108.221.11 on the map!
121.108.221.152	View precise location of 121.108.221.152 on the map!
121.108.221.32	View precise location of 121.108.221.32 on the map!
121.108.221.171	View precise location of 121.108.221.171 on the map!
121.108.221.247	View precise location of 121.108.221.247 on the map!
121.108.221.109	View precise location of 121.108.221.109 on the map!

10 Random IPs

125.78.108.48	Find precise map location of 125.78.108.48
232.155.80.197	Find precise map location of 232.155.80.197
93.220.184.238	Find precise map location of 93.220.184.238
117.103.118.242	Find precise map location of 117.103.118.242
37.46.243.171	Find precise map location of 37.46.243.171
156.33.224.198	Find precise map location of 156.33.224.198
117.94.227.28	Find precise map location of 117.94.227.28
70.237.85.232	Find precise map location of 70.237.85.232
170.31.72.85	Find precise map location of 170.31.72.85
79.115.76.242	Find precise map location of 79.115.76.242
69.105.139.83	Find precise map location of 69.105.139.83

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