221.138.4 is a class C of IPs

Sample IPs from the class C 221.138.4

221.138.4.69	View precise location of 221.138.4.69 on the map!
221.138.4.247	View precise location of 221.138.4.247 on the map!
221.138.4.125	View precise location of 221.138.4.125 on the map!
221.138.4.152	View precise location of 221.138.4.152 on the map!
221.138.4.6	View precise location of 221.138.4.6 on the map!
221.138.4.120	View precise location of 221.138.4.120 on the map!
221.138.4.207	View precise location of 221.138.4.207 on the map!
221.138.4.239	View precise location of 221.138.4.239 on the map!
221.138.4.239	View precise location of 221.138.4.239 on the map!
221.138.4.225	View precise location of 221.138.4.225 on the map!
221.138.4.139	View precise location of 221.138.4.139 on the map!

10 Random IPs

196.229.242.242	Find precise map location of 196.229.242.242
157.204.24.81	Find precise map location of 157.204.24.81
32.217.170.248	Find precise map location of 32.217.170.248
169.3.198.16	Find precise map location of 169.3.198.16
102.8.73.26	Find precise map location of 102.8.73.26
223.40.145.234	Find precise map location of 223.40.145.234
203.112.176.69	Find precise map location of 203.112.176.69
158.200.191.157	Find precise map location of 158.200.191.157
219.83.82.215	Find precise map location of 219.83.82.215
95.18.81.17	Find precise map location of 95.18.81.17
238.167.204.91	Find precise map location of 238.167.204.91

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