57.72.172 is a class C of IPs

Sample IPs from the class C 57.72.172

57.72.172.203	View precise location of 57.72.172.203 on the map!
57.72.172.148	View precise location of 57.72.172.148 on the map!
57.72.172.1	View precise location of 57.72.172.1 on the map!
57.72.172.161	View precise location of 57.72.172.161 on the map!
57.72.172.108	View precise location of 57.72.172.108 on the map!
57.72.172.222	View precise location of 57.72.172.222 on the map!
57.72.172.188	View precise location of 57.72.172.188 on the map!
57.72.172.192	View precise location of 57.72.172.192 on the map!
57.72.172.96	View precise location of 57.72.172.96 on the map!
57.72.172.74	View precise location of 57.72.172.74 on the map!
57.72.172.113	View precise location of 57.72.172.113 on the map!

10 Random IPs

128.222.132.243	Find precise map location of 128.222.132.243
102.16.239.182	Find precise map location of 102.16.239.182
162.63.105.158	Find precise map location of 162.63.105.158
54.175.87.248	Find precise map location of 54.175.87.248
114.13.38.225	Find precise map location of 114.13.38.225
197.176.219.192	Find precise map location of 197.176.219.192
163.253.124.180	Find precise map location of 163.253.124.180
148.25.246.92	Find precise map location of 148.25.246.92
131.44.10.127	Find precise map location of 131.44.10.127
148.225.73.206	Find precise map location of 148.225.73.206
83.240.69.46	Find precise map location of 83.240.69.46

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