203.181.57 is a class C of IPs

Sample IPs from the class C 203.181.57

203.181.57.12	View precise location of 203.181.57.12 on the map!
203.181.57.143	View precise location of 203.181.57.143 on the map!
203.181.57.72	View precise location of 203.181.57.72 on the map!
203.181.57.231	View precise location of 203.181.57.231 on the map!
203.181.57.178	View precise location of 203.181.57.178 on the map!
203.181.57.189	View precise location of 203.181.57.189 on the map!
203.181.57.156	View precise location of 203.181.57.156 on the map!
203.181.57.194	View precise location of 203.181.57.194 on the map!
203.181.57.56	View precise location of 203.181.57.56 on the map!
203.181.57.212	View precise location of 203.181.57.212 on the map!
203.181.57.50	View precise location of 203.181.57.50 on the map!

10 Random IPs

8.162.239.49	Find precise map location of 8.162.239.49
123.213.197.157	Find precise map location of 123.213.197.157
216.124.193.248	Find precise map location of 216.124.193.248
36.29.20.211	Find precise map location of 36.29.20.211
106.85.97.225	Find precise map location of 106.85.97.225
13.86.245.152	Find precise map location of 13.86.245.152
196.56.163.138	Find precise map location of 196.56.163.138
95.221.183.58	Find precise map location of 95.221.183.58
73.134.238.78	Find precise map location of 73.134.238.78
87.25.215.181	Find precise map location of 87.25.215.181
50.75.191.129	Find precise map location of 50.75.191.129

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