131.99.187 is a class C of IPs

Sample IPs from the class C 131.99.187

131.99.187.74	View precise location of 131.99.187.74 on the map!
131.99.187.226	View precise location of 131.99.187.226 on the map!
131.99.187.189	View precise location of 131.99.187.189 on the map!
131.99.187.82	View precise location of 131.99.187.82 on the map!
131.99.187.60	View precise location of 131.99.187.60 on the map!
131.99.187.111	View precise location of 131.99.187.111 on the map!
131.99.187.137	View precise location of 131.99.187.137 on the map!
131.99.187.244	View precise location of 131.99.187.244 on the map!
131.99.187.201	View precise location of 131.99.187.201 on the map!
131.99.187.157	View precise location of 131.99.187.157 on the map!
131.99.187.128	View precise location of 131.99.187.128 on the map!

10 Random IPs

162.53.31.226	Find precise map location of 162.53.31.226
88.66.166.105	Find precise map location of 88.66.166.105
79.36.217.135	Find precise map location of 79.36.217.135
132.182.234.231	Find precise map location of 132.182.234.231
238.218.219.164	Find precise map location of 238.218.219.164
41.92.115.111	Find precise map location of 41.92.115.111
213.159.81.6	Find precise map location of 213.159.81.6
66.251.35.128	Find precise map location of 66.251.35.128
78.61.143.224	Find precise map location of 78.61.143.224
165.241.36.140	Find precise map location of 165.241.36.140
239.68.114.63	Find precise map location of 239.68.114.63

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