13.23.31 is a class C of IPs

Sample IPs from the class C 13.23.31

13.23.31.193	View precise location of 13.23.31.193 on the map!
13.23.31.208	View precise location of 13.23.31.208 on the map!
13.23.31.116	View precise location of 13.23.31.116 on the map!
13.23.31.255	View precise location of 13.23.31.255 on the map!
13.23.31.63	View precise location of 13.23.31.63 on the map!
13.23.31.35	View precise location of 13.23.31.35 on the map!
13.23.31.151	View precise location of 13.23.31.151 on the map!
13.23.31.169	View precise location of 13.23.31.169 on the map!
13.23.31.77	View precise location of 13.23.31.77 on the map!
13.23.31.229	View precise location of 13.23.31.229 on the map!
13.23.31.70	View precise location of 13.23.31.70 on the map!

10 Random IPs

87.147.192.162	Find precise map location of 87.147.192.162
140.100.113.221	Find precise map location of 140.100.113.221
148.32.189.11	Find precise map location of 148.32.189.11
150.246.29.48	Find precise map location of 150.246.29.48
7.45.172.96	Find precise map location of 7.45.172.96
67.241.58.200	Find precise map location of 67.241.58.200
227.226.230.70	Find precise map location of 227.226.230.70
51.81.196.56	Find precise map location of 51.81.196.56
117.128.117.105	Find precise map location of 117.128.117.105
164.84.162.63	Find precise map location of 164.84.162.63
56.137.55.238	Find precise map location of 56.137.55.238

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