81.40.66 is a class C of IPs

Sample IPs from the class C 81.40.66

81.40.66.159	View precise location of 81.40.66.159 on the map!
81.40.66.247	View precise location of 81.40.66.247 on the map!
81.40.66.83	View precise location of 81.40.66.83 on the map!
81.40.66.246	View precise location of 81.40.66.246 on the map!
81.40.66.102	View precise location of 81.40.66.102 on the map!
81.40.66.79	View precise location of 81.40.66.79 on the map!
81.40.66.162	View precise location of 81.40.66.162 on the map!
81.40.66.250	View precise location of 81.40.66.250 on the map!
81.40.66.217	View precise location of 81.40.66.217 on the map!
81.40.66.252	View precise location of 81.40.66.252 on the map!
81.40.66.179	View precise location of 81.40.66.179 on the map!

10 Random IPs

12.161.150.206	Find precise map location of 12.161.150.206
117.123.237.91	Find precise map location of 117.123.237.91
47.172.105.92	Find precise map location of 47.172.105.92
148.215.114.37	Find precise map location of 148.215.114.37
136.83.43.198	Find precise map location of 136.83.43.198
17.158.104.186	Find precise map location of 17.158.104.186
2.27.67.52	Find precise map location of 2.27.67.52
134.109.81.211	Find precise map location of 134.109.81.211
145.166.227.43	Find precise map location of 145.166.227.43
233.98.190.63	Find precise map location of 233.98.190.63
39.94.123.32	Find precise map location of 39.94.123.32

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