121.61.55 is a class C of IPs

Sample IPs from the class C 121.61.55

121.61.55.220	View precise location of 121.61.55.220 on the map!
121.61.55.132	View precise location of 121.61.55.132 on the map!
121.61.55.219	View precise location of 121.61.55.219 on the map!
121.61.55.94	View precise location of 121.61.55.94 on the map!
121.61.55.98	View precise location of 121.61.55.98 on the map!
121.61.55.172	View precise location of 121.61.55.172 on the map!
121.61.55.91	View precise location of 121.61.55.91 on the map!
121.61.55.95	View precise location of 121.61.55.95 on the map!
121.61.55.124	View precise location of 121.61.55.124 on the map!
121.61.55.154	View precise location of 121.61.55.154 on the map!
121.61.55.184	View precise location of 121.61.55.184 on the map!

10 Random IPs

168.4.118.25	Find precise map location of 168.4.118.25
75.50.218.171	Find precise map location of 75.50.218.171
29.128.11.231	Find precise map location of 29.128.11.231
53.240.4.213	Find precise map location of 53.240.4.213
107.138.47.152	Find precise map location of 107.138.47.152
159.118.211.69	Find precise map location of 159.118.211.69
153.91.157.108	Find precise map location of 153.91.157.108
231.132.53.30	Find precise map location of 231.132.53.30
216.212.233.164	Find precise map location of 216.212.233.164
50.1.119.163	Find precise map location of 50.1.119.163
11.203.243.238	Find precise map location of 11.203.243.238

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