143.104 is a class B of IPs

Sample IPs from the class B 143.104

143.104.43.131	View precise location of 143.104.43.131 on the map!
143.104.247.11	View precise location of 143.104.247.11 on the map!
143.104.172.211	View precise location of 143.104.172.211 on the map!
143.104.26.81	View precise location of 143.104.26.81 on the map!
143.104.248.133	View precise location of 143.104.248.133 on the map!
143.104.141.53	View precise location of 143.104.141.53 on the map!
143.104.132.31	View precise location of 143.104.132.31 on the map!
143.104.44.33	View precise location of 143.104.44.33 on the map!
143.104.254.161	View precise location of 143.104.254.161 on the map!
143.104.235.170	View precise location of 143.104.235.170 on the map!
143.104.132.76	View precise location of 143.104.132.76 on the map!

10 Random IPs

22.4.193.26	Find precise map location of 22.4.193.26
145.136.236.18	Find precise map location of 145.136.236.18
142.103.167.148	Find precise map location of 142.103.167.148
214.218.237.81	Find precise map location of 214.218.237.81
33.221.57.224	Find precise map location of 33.221.57.224
64.103.159.61	Find precise map location of 64.103.159.61
104.222.67.43	Find precise map location of 104.222.67.43
32.196.41.136	Find precise map location of 32.196.41.136
14.221.142.133	Find precise map location of 14.221.142.133
121.51.183.82	Find precise map location of 121.51.183.82
236.78.127.222	Find precise map location of 236.78.127.222

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