156.57.13 is a class C of IPs

Sample IPs from the class C 156.57.13

156.57.13.239	View precise location of 156.57.13.239 on the map!
156.57.13.105	View precise location of 156.57.13.105 on the map!
156.57.13.175	View precise location of 156.57.13.175 on the map!
156.57.13.207	View precise location of 156.57.13.207 on the map!
156.57.13.25	View precise location of 156.57.13.25 on the map!
156.57.13.102	View precise location of 156.57.13.102 on the map!
156.57.13.105	View precise location of 156.57.13.105 on the map!
156.57.13.99	View precise location of 156.57.13.99 on the map!
156.57.13.29	View precise location of 156.57.13.29 on the map!
156.57.13.165	View precise location of 156.57.13.165 on the map!
156.57.13.23	View precise location of 156.57.13.23 on the map!

10 Random IPs

121.86.148.193	Find precise map location of 121.86.148.193
142.144.179.214	Find precise map location of 142.144.179.214
127.201.202.208	Find precise map location of 127.201.202.208
165.9.251.107	Find precise map location of 165.9.251.107
207.51.27.191	Find precise map location of 207.51.27.191
167.142.56.101	Find precise map location of 167.142.56.101
112.234.13.220	Find precise map location of 112.234.13.220
56.206.200.131	Find precise map location of 56.206.200.131
231.156.248.240	Find precise map location of 231.156.248.240
146.146.29.232	Find precise map location of 146.146.29.232
154.44.196.14	Find precise map location of 154.44.196.14

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