172.204.57 is a class C of IPs

Sample IPs from the class C 172.204.57

172.204.57.220	View precise location of 172.204.57.220 on the map!
172.204.57.196	View precise location of 172.204.57.196 on the map!
172.204.57.23	View precise location of 172.204.57.23 on the map!
172.204.57.202	View precise location of 172.204.57.202 on the map!
172.204.57.20	View precise location of 172.204.57.20 on the map!
172.204.57.35	View precise location of 172.204.57.35 on the map!
172.204.57.228	View precise location of 172.204.57.228 on the map!
172.204.57.7	View precise location of 172.204.57.7 on the map!
172.204.57.243	View precise location of 172.204.57.243 on the map!
172.204.57.245	View precise location of 172.204.57.245 on the map!
172.204.57.158	View precise location of 172.204.57.158 on the map!

10 Random IPs

162.242.102.90	Find precise map location of 162.242.102.90
163.117.59.60	Find precise map location of 163.117.59.60
209.62.10.192	Find precise map location of 209.62.10.192
176.132.169.248	Find precise map location of 176.132.169.248
82.246.240.132	Find precise map location of 82.246.240.132
117.52.195.15	Find precise map location of 117.52.195.15
141.222.171.11	Find precise map location of 141.222.171.11
157.149.154.7	Find precise map location of 157.149.154.7
143.65.188.100	Find precise map location of 143.65.188.100
17.200.8.207	Find precise map location of 17.200.8.207
255.172.55.235	Find precise map location of 255.172.55.235

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