66.18.39 is a class C of IPs

Sample IPs from the class C 66.18.39

66.18.39.123	View precise location of 66.18.39.123 on the map!
66.18.39.186	View precise location of 66.18.39.186 on the map!
66.18.39.252	View precise location of 66.18.39.252 on the map!
66.18.39.3	View precise location of 66.18.39.3 on the map!
66.18.39.233	View precise location of 66.18.39.233 on the map!
66.18.39.2	View precise location of 66.18.39.2 on the map!
66.18.39.251	View precise location of 66.18.39.251 on the map!
66.18.39.46	View precise location of 66.18.39.46 on the map!
66.18.39.215	View precise location of 66.18.39.215 on the map!
66.18.39.57	View precise location of 66.18.39.57 on the map!
66.18.39.183	View precise location of 66.18.39.183 on the map!

10 Random IPs

44.92.22.129	Find precise map location of 44.92.22.129
175.133.68.101	Find precise map location of 175.133.68.101
187.188.95.77	Find precise map location of 187.188.95.77
251.60.56.126	Find precise map location of 251.60.56.126
242.141.192.209	Find precise map location of 242.141.192.209
206.201.143.25	Find precise map location of 206.201.143.25
236.157.231.240	Find precise map location of 236.157.231.240
37.226.193.87	Find precise map location of 37.226.193.87
91.50.140.192	Find precise map location of 91.50.140.192
244.93.166.188	Find precise map location of 244.93.166.188
39.146.40.92	Find precise map location of 39.146.40.92

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