121.157.209 is a class C of IPs

Sample IPs from the class C 121.157.209

121.157.209.51	View precise location of 121.157.209.51 on the map!
121.157.209.188	View precise location of 121.157.209.188 on the map!
121.157.209.184	View precise location of 121.157.209.184 on the map!
121.157.209.224	View precise location of 121.157.209.224 on the map!
121.157.209.17	View precise location of 121.157.209.17 on the map!
121.157.209.67	View precise location of 121.157.209.67 on the map!
121.157.209.230	View precise location of 121.157.209.230 on the map!
121.157.209.199	View precise location of 121.157.209.199 on the map!
121.157.209.52	View precise location of 121.157.209.52 on the map!
121.157.209.63	View precise location of 121.157.209.63 on the map!
121.157.209.86	View precise location of 121.157.209.86 on the map!

10 Random IPs

85.201.247.72	Find precise map location of 85.201.247.72
15.170.3.14	Find precise map location of 15.170.3.14
26.98.233.122	Find precise map location of 26.98.233.122
126.229.91.187	Find precise map location of 126.229.91.187
35.153.55.73	Find precise map location of 35.153.55.73
105.43.4.104	Find precise map location of 105.43.4.104
30.43.211.21	Find precise map location of 30.43.211.21
201.125.12.94	Find precise map location of 201.125.12.94
151.174.129.105	Find precise map location of 151.174.129.105
86.170.232.155	Find precise map location of 86.170.232.155
251.226.159.98	Find precise map location of 251.226.159.98

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