113.57.221 is a class C of IPs

Sample IPs from the class C 113.57.221

113.57.221.81	View precise location of 113.57.221.81 on the map!
113.57.221.253	View precise location of 113.57.221.253 on the map!
113.57.221.46	View precise location of 113.57.221.46 on the map!
113.57.221.232	View precise location of 113.57.221.232 on the map!
113.57.221.160	View precise location of 113.57.221.160 on the map!
113.57.221.208	View precise location of 113.57.221.208 on the map!
113.57.221.124	View precise location of 113.57.221.124 on the map!
113.57.221.249	View precise location of 113.57.221.249 on the map!
113.57.221.76	View precise location of 113.57.221.76 on the map!
113.57.221.112	View precise location of 113.57.221.112 on the map!
113.57.221.226	View precise location of 113.57.221.226 on the map!

10 Random IPs

180.146.7.188	Find precise map location of 180.146.7.188
169.86.108.136	Find precise map location of 169.86.108.136
58.108.192.113	Find precise map location of 58.108.192.113
39.242.77.227	Find precise map location of 39.242.77.227
221.145.194.193	Find precise map location of 221.145.194.193
10.116.199.137	Find precise map location of 10.116.199.137
141.149.145.215	Find precise map location of 141.149.145.215
42.162.235.201	Find precise map location of 42.162.235.201
43.56.206.231	Find precise map location of 43.56.206.231
246.41.63.159	Find precise map location of 246.41.63.159
100.65.128.210	Find precise map location of 100.65.128.210

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