221.66.90 is a class C of IPs

Sample IPs from the class C 221.66.90

221.66.90.231	View precise location of 221.66.90.231 on the map!
221.66.90.133	View precise location of 221.66.90.133 on the map!
221.66.90.77	View precise location of 221.66.90.77 on the map!
221.66.90.2	View precise location of 221.66.90.2 on the map!
221.66.90.75	View precise location of 221.66.90.75 on the map!
221.66.90.128	View precise location of 221.66.90.128 on the map!
221.66.90.212	View precise location of 221.66.90.212 on the map!
221.66.90.246	View precise location of 221.66.90.246 on the map!
221.66.90.67	View precise location of 221.66.90.67 on the map!
221.66.90.139	View precise location of 221.66.90.139 on the map!
221.66.90.117	View precise location of 221.66.90.117 on the map!

10 Random IPs

253.208.3.236	Find precise map location of 253.208.3.236
200.180.128.20	Find precise map location of 200.180.128.20
122.81.130.251	Find precise map location of 122.81.130.251
154.165.246.239	Find precise map location of 154.165.246.239
58.165.245.144	Find precise map location of 58.165.245.144
59.181.182.104	Find precise map location of 59.181.182.104
23.9.255.31	Find precise map location of 23.9.255.31
134.3.11.193	Find precise map location of 134.3.11.193
89.128.207.217	Find precise map location of 89.128.207.217
250.42.146.253	Find precise map location of 250.42.146.253
3.223.162.8	Find precise map location of 3.223.162.8

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