81.72.36 is a class C of IPs

Sample IPs from the class C 81.72.36

81.72.36.227	View precise location of 81.72.36.227 on the map!
81.72.36.208	View precise location of 81.72.36.208 on the map!
81.72.36.230	View precise location of 81.72.36.230 on the map!
81.72.36.151	View precise location of 81.72.36.151 on the map!
81.72.36.132	View precise location of 81.72.36.132 on the map!
81.72.36.181	View precise location of 81.72.36.181 on the map!
81.72.36.243	View precise location of 81.72.36.243 on the map!
81.72.36.94	View precise location of 81.72.36.94 on the map!
81.72.36.22	View precise location of 81.72.36.22 on the map!
81.72.36.211	View precise location of 81.72.36.211 on the map!
81.72.36.161	View precise location of 81.72.36.161 on the map!

10 Random IPs

254.129.132.208	Find precise map location of 254.129.132.208
197.128.150.232	Find precise map location of 197.128.150.232
61.140.194.4	Find precise map location of 61.140.194.4
12.174.224.80	Find precise map location of 12.174.224.80
131.28.202.50	Find precise map location of 131.28.202.50
150.128.84.59	Find precise map location of 150.128.84.59
86.140.96.182	Find precise map location of 86.140.96.182
37.47.90.198	Find precise map location of 37.47.90.198
40.91.7.29	Find precise map location of 40.91.7.29
200.230.25.60	Find precise map location of 200.230.25.60
105.232.217.232	Find precise map location of 105.232.217.232

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