81.18.81 is a class C of IPs

Sample IPs from the class C 81.18.81

81.18.81.143	View precise location of 81.18.81.143 on the map!
81.18.81.9	View precise location of 81.18.81.9 on the map!
81.18.81.165	View precise location of 81.18.81.165 on the map!
81.18.81.207	View precise location of 81.18.81.207 on the map!
81.18.81.255	View precise location of 81.18.81.255 on the map!
81.18.81.242	View precise location of 81.18.81.242 on the map!
81.18.81.6	View precise location of 81.18.81.6 on the map!
81.18.81.141	View precise location of 81.18.81.141 on the map!
81.18.81.126	View precise location of 81.18.81.126 on the map!
81.18.81.242	View precise location of 81.18.81.242 on the map!
81.18.81.25	View precise location of 81.18.81.25 on the map!

10 Random IPs

65.70.124.65	Find precise map location of 65.70.124.65
103.41.162.160	Find precise map location of 103.41.162.160
3.126.12.79	Find precise map location of 3.126.12.79
240.10.36.81	Find precise map location of 240.10.36.81
126.211.139.46	Find precise map location of 126.211.139.46
36.144.226.205	Find precise map location of 36.144.226.205
99.155.106.240	Find precise map location of 99.155.106.240
21.167.214.81	Find precise map location of 21.167.214.81
63.131.232.123	Find precise map location of 63.131.232.123
203.244.184.70	Find precise map location of 203.244.184.70
235.189.122.159	Find precise map location of 235.189.122.159

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