223.66.21 is a class C of IPs

Sample IPs from the class C 223.66.21

223.66.21.39	View precise location of 223.66.21.39 on the map!
223.66.21.41	View precise location of 223.66.21.41 on the map!
223.66.21.164	View precise location of 223.66.21.164 on the map!
223.66.21.32	View precise location of 223.66.21.32 on the map!
223.66.21.243	View precise location of 223.66.21.243 on the map!
223.66.21.41	View precise location of 223.66.21.41 on the map!
223.66.21.104	View precise location of 223.66.21.104 on the map!
223.66.21.229	View precise location of 223.66.21.229 on the map!
223.66.21.222	View precise location of 223.66.21.222 on the map!
223.66.21.91	View precise location of 223.66.21.91 on the map!
223.66.21.1	View precise location of 223.66.21.1 on the map!

10 Random IPs

252.138.173.95	Find precise map location of 252.138.173.95
132.135.214.188	Find precise map location of 132.135.214.188
116.208.13.93	Find precise map location of 116.208.13.93
139.92.118.28	Find precise map location of 139.92.118.28
182.72.63.64	Find precise map location of 182.72.63.64
154.170.42.100	Find precise map location of 154.170.42.100
244.150.109.14	Find precise map location of 244.150.109.14
254.145.54.146	Find precise map location of 254.145.54.146
177.147.65.233	Find precise map location of 177.147.65.233
158.177.72.101	Find precise map location of 158.177.72.101
74.253.154.87	Find precise map location of 74.253.154.87

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