15.81.217 is a class C of IPs

Sample IPs from the class C 15.81.217

15.81.217.216	View precise location of 15.81.217.216 on the map!
15.81.217.85	View precise location of 15.81.217.85 on the map!
15.81.217.221	View precise location of 15.81.217.221 on the map!
15.81.217.85	View precise location of 15.81.217.85 on the map!
15.81.217.150	View precise location of 15.81.217.150 on the map!
15.81.217.16	View precise location of 15.81.217.16 on the map!
15.81.217.79	View precise location of 15.81.217.79 on the map!
15.81.217.52	View precise location of 15.81.217.52 on the map!
15.81.217.133	View precise location of 15.81.217.133 on the map!
15.81.217.145	View precise location of 15.81.217.145 on the map!
15.81.217.238	View precise location of 15.81.217.238 on the map!

10 Random IPs

17.96.182.34	Find precise map location of 17.96.182.34
212.244.96.76	Find precise map location of 212.244.96.76
110.71.13.134	Find precise map location of 110.71.13.134
50.9.11.88	Find precise map location of 50.9.11.88
100.87.31.119	Find precise map location of 100.87.31.119
16.150.197.223	Find precise map location of 16.150.197.223
145.60.245.128	Find precise map location of 145.60.245.128
25.20.24.60	Find precise map location of 25.20.24.60
115.247.92.79	Find precise map location of 115.247.92.79
150.193.61.253	Find precise map location of 150.193.61.253
227.203.169.2	Find precise map location of 227.203.169.2

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