142.54.21 is a class C of IPs

Sample IPs from the class C 142.54.21

142.54.21.92	View precise location of 142.54.21.92 on the map!
142.54.21.179	View precise location of 142.54.21.179 on the map!
142.54.21.39	View precise location of 142.54.21.39 on the map!
142.54.21.250	View precise location of 142.54.21.250 on the map!
142.54.21.152	View precise location of 142.54.21.152 on the map!
142.54.21.64	View precise location of 142.54.21.64 on the map!
142.54.21.114	View precise location of 142.54.21.114 on the map!
142.54.21.140	View precise location of 142.54.21.140 on the map!
142.54.21.21	View precise location of 142.54.21.21 on the map!
142.54.21.253	View precise location of 142.54.21.253 on the map!
142.54.21.174	View precise location of 142.54.21.174 on the map!

10 Random IPs

100.158.85.223	Find precise map location of 100.158.85.223
105.148.247.71	Find precise map location of 105.148.247.71
189.173.154.159	Find precise map location of 189.173.154.159
110.54.156.104	Find precise map location of 110.54.156.104
109.182.247.170	Find precise map location of 109.182.247.170
125.87.198.48	Find precise map location of 125.87.198.48
50.4.85.158	Find precise map location of 50.4.85.158
61.242.117.131	Find precise map location of 61.242.117.131
35.120.195.217	Find precise map location of 35.120.195.217
220.76.22.222	Find precise map location of 220.76.22.222
216.29.214.234	Find precise map location of 216.29.214.234

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