223.21.153 is a class C of IPs

Sample IPs from the class C 223.21.153

223.21.153.51	View precise location of 223.21.153.51 on the map!
223.21.153.104	View precise location of 223.21.153.104 on the map!
223.21.153.213	View precise location of 223.21.153.213 on the map!
223.21.153.129	View precise location of 223.21.153.129 on the map!
223.21.153.172	View precise location of 223.21.153.172 on the map!
223.21.153.1	View precise location of 223.21.153.1 on the map!
223.21.153.116	View precise location of 223.21.153.116 on the map!
223.21.153.255	View precise location of 223.21.153.255 on the map!
223.21.153.14	View precise location of 223.21.153.14 on the map!
223.21.153.13	View precise location of 223.21.153.13 on the map!
223.21.153.205	View precise location of 223.21.153.205 on the map!

10 Random IPs

4.43.18.5	Find precise map location of 4.43.18.5
41.73.41.67	Find precise map location of 41.73.41.67
123.204.63.80	Find precise map location of 123.204.63.80
191.97.36.100	Find precise map location of 191.97.36.100
133.34.157.108	Find precise map location of 133.34.157.108
181.216.3.196	Find precise map location of 181.216.3.196
107.186.222.207	Find precise map location of 107.186.222.207
148.46.209.206	Find precise map location of 148.46.209.206
179.165.117.75	Find precise map location of 179.165.117.75
229.91.215.146	Find precise map location of 229.91.215.146
143.179.103.1	Find precise map location of 143.179.103.1

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