121.137.30 is a class C of IPs

Sample IPs from the class C 121.137.30

121.137.30.116	View precise location of 121.137.30.116 on the map!
121.137.30.212	View precise location of 121.137.30.212 on the map!
121.137.30.63	View precise location of 121.137.30.63 on the map!
121.137.30.105	View precise location of 121.137.30.105 on the map!
121.137.30.10	View precise location of 121.137.30.10 on the map!
121.137.30.80	View precise location of 121.137.30.80 on the map!
121.137.30.234	View precise location of 121.137.30.234 on the map!
121.137.30.189	View precise location of 121.137.30.189 on the map!
121.137.30.208	View precise location of 121.137.30.208 on the map!
121.137.30.77	View precise location of 121.137.30.77 on the map!
121.137.30.131	View precise location of 121.137.30.131 on the map!

10 Random IPs

146.253.109.47	Find precise map location of 146.253.109.47
32.213.209.96	Find precise map location of 32.213.209.96
98.67.13.173	Find precise map location of 98.67.13.173
226.29.187.255	Find precise map location of 226.29.187.255
85.152.111.57	Find precise map location of 85.152.111.57
91.182.116.94	Find precise map location of 91.182.116.94
111.199.229.63	Find precise map location of 111.199.229.63
239.48.145.187	Find precise map location of 239.48.145.187
74.16.232.199	Find precise map location of 74.16.232.199
29.33.168.218	Find precise map location of 29.33.168.218
76.194.18.135	Find precise map location of 76.194.18.135

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