143.72 is a class B of IPs

Sample IPs from the class B 143.72

143.72.251.222	View precise location of 143.72.251.222 on the map!
143.72.172.7	View precise location of 143.72.172.7 on the map!
143.72.97.23	View precise location of 143.72.97.23 on the map!
143.72.239.39	View precise location of 143.72.239.39 on the map!
143.72.98.120	View precise location of 143.72.98.120 on the map!
143.72.198.111	View precise location of 143.72.198.111 on the map!
143.72.253.15	View precise location of 143.72.253.15 on the map!
143.72.255.136	View precise location of 143.72.255.136 on the map!
143.72.255.178	View precise location of 143.72.255.178 on the map!
143.72.151.143	View precise location of 143.72.151.143 on the map!
143.72.216.195	View precise location of 143.72.216.195 on the map!

10 Random IPs

246.23.9.117	Find precise map location of 246.23.9.117
98.232.70.34	Find precise map location of 98.232.70.34
249.227.24.216	Find precise map location of 249.227.24.216
233.42.168.5	Find precise map location of 233.42.168.5
123.182.230.147	Find precise map location of 123.182.230.147
56.138.118.177	Find precise map location of 56.138.118.177
186.23.182.222	Find precise map location of 186.23.182.222
255.18.211.235	Find precise map location of 255.18.211.235
176.48.83.12	Find precise map location of 176.48.83.12
65.167.8.88	Find precise map location of 65.167.8.88
149.109.171.232	Find precise map location of 149.109.171.232

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