143.51 is a class B of IPs

Sample IPs from the class B 143.51

143.51.34.12	View precise location of 143.51.34.12 on the map!
143.51.138.175	View precise location of 143.51.138.175 on the map!
143.51.214.10	View precise location of 143.51.214.10 on the map!
143.51.64.108	View precise location of 143.51.64.108 on the map!
143.51.223.83	View precise location of 143.51.223.83 on the map!
143.51.210.99	View precise location of 143.51.210.99 on the map!
143.51.75.139	View precise location of 143.51.75.139 on the map!
143.51.215.86	View precise location of 143.51.215.86 on the map!
143.51.42.215	View precise location of 143.51.42.215 on the map!
143.51.241.186	View precise location of 143.51.241.186 on the map!
143.51.17.23	View precise location of 143.51.17.23 on the map!

10 Random IPs

57.21.163.40	Find precise map location of 57.21.163.40
232.27.67.25	Find precise map location of 232.27.67.25
22.100.182.163	Find precise map location of 22.100.182.163
15.119.194.215	Find precise map location of 15.119.194.215
212.25.206.122	Find precise map location of 212.25.206.122
178.84.216.111	Find precise map location of 178.84.216.111
121.233.13.210	Find precise map location of 121.233.13.210
93.219.245.93	Find precise map location of 93.219.245.93
45.31.34.152	Find precise map location of 45.31.34.152
178.223.221.238	Find precise map location of 178.223.221.238
20.29.115.233	Find precise map location of 20.29.115.233

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