131.23.215 is a class C of IPs

Sample IPs from the class C 131.23.215

131.23.215.233	View precise location of 131.23.215.233 on the map!
131.23.215.77	View precise location of 131.23.215.77 on the map!
131.23.215.3	View precise location of 131.23.215.3 on the map!
131.23.215.145	View precise location of 131.23.215.145 on the map!
131.23.215.178	View precise location of 131.23.215.178 on the map!
131.23.215.235	View precise location of 131.23.215.235 on the map!
131.23.215.216	View precise location of 131.23.215.216 on the map!
131.23.215.65	View precise location of 131.23.215.65 on the map!
131.23.215.14	View precise location of 131.23.215.14 on the map!
131.23.215.196	View precise location of 131.23.215.196 on the map!
131.23.215.225	View precise location of 131.23.215.225 on the map!

10 Random IPs

246.65.199.241	Find precise map location of 246.65.199.241
86.219.35.40	Find precise map location of 86.219.35.40
126.169.203.81	Find precise map location of 126.169.203.81
155.104.225.253	Find precise map location of 155.104.225.253
208.40.168.183	Find precise map location of 208.40.168.183
77.204.144.41	Find precise map location of 77.204.144.41
163.155.89.10	Find precise map location of 163.155.89.10
223.135.89.179	Find precise map location of 223.135.89.179
236.79.174.91	Find precise map location of 236.79.174.91
160.123.72.191	Find precise map location of 160.123.72.191
2.78.230.144	Find precise map location of 2.78.230.144

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