121.140.136 is a class C of IPs

Sample IPs from the class C 121.140.136

121.140.136.91	View precise location of 121.140.136.91 on the map!
121.140.136.28	View precise location of 121.140.136.28 on the map!
121.140.136.233	View precise location of 121.140.136.233 on the map!
121.140.136.123	View precise location of 121.140.136.123 on the map!
121.140.136.55	View precise location of 121.140.136.55 on the map!
121.140.136.12	View precise location of 121.140.136.12 on the map!
121.140.136.88	View precise location of 121.140.136.88 on the map!
121.140.136.59	View precise location of 121.140.136.59 on the map!
121.140.136.242	View precise location of 121.140.136.242 on the map!
121.140.136.3	View precise location of 121.140.136.3 on the map!
121.140.136.16	View precise location of 121.140.136.16 on the map!

10 Random IPs

88.205.212.244	Find precise map location of 88.205.212.244
215.194.87.127	Find precise map location of 215.194.87.127
74.19.28.86	Find precise map location of 74.19.28.86
113.149.185.220	Find precise map location of 113.149.185.220
49.124.214.41	Find precise map location of 49.124.214.41
81.233.225.253	Find precise map location of 81.233.225.253
48.192.225.164	Find precise map location of 48.192.225.164
188.27.66.17	Find precise map location of 188.27.66.17
73.206.90.165	Find precise map location of 73.206.90.165
59.217.220.158	Find precise map location of 59.217.220.158
215.73.168.33	Find precise map location of 215.73.168.33

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