13.20.157 is a class C of IPs

Sample IPs from the class C 13.20.157

13.20.157.150	View precise location of 13.20.157.150 on the map!
13.20.157.44	View precise location of 13.20.157.44 on the map!
13.20.157.240	View precise location of 13.20.157.240 on the map!
13.20.157.63	View precise location of 13.20.157.63 on the map!
13.20.157.24	View precise location of 13.20.157.24 on the map!
13.20.157.136	View precise location of 13.20.157.136 on the map!
13.20.157.18	View precise location of 13.20.157.18 on the map!
13.20.157.141	View precise location of 13.20.157.141 on the map!
13.20.157.74	View precise location of 13.20.157.74 on the map!
13.20.157.189	View precise location of 13.20.157.189 on the map!
13.20.157.165	View precise location of 13.20.157.165 on the map!

10 Random IPs

109.241.86.200	Find precise map location of 109.241.86.200
99.255.78.81	Find precise map location of 99.255.78.81
121.136.180.77	Find precise map location of 121.136.180.77
116.92.223.18	Find precise map location of 116.92.223.18
174.134.75.139	Find precise map location of 174.134.75.139
187.191.197.44	Find precise map location of 187.191.197.44
58.254.41.159	Find precise map location of 58.254.41.159
209.63.67.79	Find precise map location of 209.63.67.79
143.105.63.137	Find precise map location of 143.105.63.137
63.53.134.184	Find precise map location of 63.53.134.184
64.203.83.184	Find precise map location of 64.203.83.184

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