21.66.207 is a class C of IPs

Sample IPs from the class C 21.66.207

21.66.207.251	View precise location of 21.66.207.251 on the map!
21.66.207.123	View precise location of 21.66.207.123 on the map!
21.66.207.9	View precise location of 21.66.207.9 on the map!
21.66.207.192	View precise location of 21.66.207.192 on the map!
21.66.207.5	View precise location of 21.66.207.5 on the map!
21.66.207.50	View precise location of 21.66.207.50 on the map!
21.66.207.81	View precise location of 21.66.207.81 on the map!
21.66.207.214	View precise location of 21.66.207.214 on the map!
21.66.207.164	View precise location of 21.66.207.164 on the map!
21.66.207.59	View precise location of 21.66.207.59 on the map!
21.66.207.222	View precise location of 21.66.207.222 on the map!

10 Random IPs

76.155.78.1	Find precise map location of 76.155.78.1
145.136.68.16	Find precise map location of 145.136.68.16
169.151.3.16	Find precise map location of 169.151.3.16
1.48.206.96	Find precise map location of 1.48.206.96
16.81.31.148	Find precise map location of 16.81.31.148
43.220.245.202	Find precise map location of 43.220.245.202
142.173.52.13	Find precise map location of 142.173.52.13
128.189.119.219	Find precise map location of 128.189.119.219
232.62.240.176	Find precise map location of 232.62.240.176
205.165.53.128	Find precise map location of 205.165.53.128
252.116.40.237	Find precise map location of 252.116.40.237

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