66.188.81 is a class C of IPs

Sample IPs from the class C 66.188.81

66.188.81.33	View precise location of 66.188.81.33 on the map!
66.188.81.3	View precise location of 66.188.81.3 on the map!
66.188.81.80	View precise location of 66.188.81.80 on the map!
66.188.81.137	View precise location of 66.188.81.137 on the map!
66.188.81.140	View precise location of 66.188.81.140 on the map!
66.188.81.144	View precise location of 66.188.81.144 on the map!
66.188.81.50	View precise location of 66.188.81.50 on the map!
66.188.81.177	View precise location of 66.188.81.177 on the map!
66.188.81.147	View precise location of 66.188.81.147 on the map!
66.188.81.76	View precise location of 66.188.81.76 on the map!
66.188.81.238	View precise location of 66.188.81.238 on the map!

10 Random IPs

54.15.153.75	Find precise map location of 54.15.153.75
44.102.167.219	Find precise map location of 44.102.167.219
210.59.89.168	Find precise map location of 210.59.89.168
171.158.177.230	Find precise map location of 171.158.177.230
19.27.7.155	Find precise map location of 19.27.7.155
81.216.87.14	Find precise map location of 81.216.87.14
34.58.80.152	Find precise map location of 34.58.80.152
27.255.134.211	Find precise map location of 27.255.134.211
148.13.82.195	Find precise map location of 148.13.82.195
129.15.123.240	Find precise map location of 129.15.123.240
132.43.141.22	Find precise map location of 132.43.141.22

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