143.12.138 is a class C of IPs

Sample IPs from the class C 143.12.138

143.12.138.239	View precise location of 143.12.138.239 on the map!
143.12.138.80	View precise location of 143.12.138.80 on the map!
143.12.138.107	View precise location of 143.12.138.107 on the map!
143.12.138.122	View precise location of 143.12.138.122 on the map!
143.12.138.91	View precise location of 143.12.138.91 on the map!
143.12.138.228	View precise location of 143.12.138.228 on the map!
143.12.138.183	View precise location of 143.12.138.183 on the map!
143.12.138.55	View precise location of 143.12.138.55 on the map!
143.12.138.227	View precise location of 143.12.138.227 on the map!
143.12.138.146	View precise location of 143.12.138.146 on the map!
143.12.138.2	View precise location of 143.12.138.2 on the map!

10 Random IPs

91.118.16.24	Find precise map location of 91.118.16.24
194.133.224.83	Find precise map location of 194.133.224.83
114.138.102.82	Find precise map location of 114.138.102.82
178.241.222.160	Find precise map location of 178.241.222.160
222.119.141.144	Find precise map location of 222.119.141.144
102.235.232.192	Find precise map location of 102.235.232.192
24.56.32.174	Find precise map location of 24.56.32.174
138.26.225.122	Find precise map location of 138.26.225.122
196.122.190.199	Find precise map location of 196.122.190.199
160.89.241.56	Find precise map location of 160.89.241.56
120.218.94.191	Find precise map location of 120.218.94.191

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