223.33.21 is a class C of IPs

Sample IPs from the class C 223.33.21

223.33.21.228	View precise location of 223.33.21.228 on the map!
223.33.21.128	View precise location of 223.33.21.128 on the map!
223.33.21.82	View precise location of 223.33.21.82 on the map!
223.33.21.107	View precise location of 223.33.21.107 on the map!
223.33.21.219	View precise location of 223.33.21.219 on the map!
223.33.21.23	View precise location of 223.33.21.23 on the map!
223.33.21.145	View precise location of 223.33.21.145 on the map!
223.33.21.144	View precise location of 223.33.21.144 on the map!
223.33.21.55	View precise location of 223.33.21.55 on the map!
223.33.21.199	View precise location of 223.33.21.199 on the map!
223.33.21.240	View precise location of 223.33.21.240 on the map!

10 Random IPs

92.225.229.182	Find precise map location of 92.225.229.182
1.164.4.168	Find precise map location of 1.164.4.168
119.103.135.199	Find precise map location of 119.103.135.199
33.170.124.96	Find precise map location of 33.170.124.96
94.158.231.56	Find precise map location of 94.158.231.56
119.30.170.96	Find precise map location of 119.30.170.96
54.90.99.173	Find precise map location of 54.90.99.173
12.100.128.79	Find precise map location of 12.100.128.79
90.77.145.225	Find precise map location of 90.77.145.225
219.163.131.255	Find precise map location of 219.163.131.255
29.65.4.151	Find precise map location of 29.65.4.151

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