143.77.23 is a class C of IPs

Sample IPs from the class C 143.77.23

143.77.23.101	View precise location of 143.77.23.101 on the map!
143.77.23.133	View precise location of 143.77.23.133 on the map!
143.77.23.84	View precise location of 143.77.23.84 on the map!
143.77.23.200	View precise location of 143.77.23.200 on the map!
143.77.23.67	View precise location of 143.77.23.67 on the map!
143.77.23.122	View precise location of 143.77.23.122 on the map!
143.77.23.240	View precise location of 143.77.23.240 on the map!
143.77.23.28	View precise location of 143.77.23.28 on the map!
143.77.23.197	View precise location of 143.77.23.197 on the map!
143.77.23.193	View precise location of 143.77.23.193 on the map!
143.77.23.48	View precise location of 143.77.23.48 on the map!

10 Random IPs

233.128.112.34	Find precise map location of 233.128.112.34
183.121.59.67	Find precise map location of 183.121.59.67
205.19.193.138	Find precise map location of 205.19.193.138
77.185.165.103	Find precise map location of 77.185.165.103
129.90.80.78	Find precise map location of 129.90.80.78
178.148.198.96	Find precise map location of 178.148.198.96
65.125.165.163	Find precise map location of 65.125.165.163
161.99.215.200	Find precise map location of 161.99.215.200
104.6.19.205	Find precise map location of 104.6.19.205
50.104.242.208	Find precise map location of 50.104.242.208
157.139.55.213	Find precise map location of 157.139.55.213

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