57.144.139 is a class C of IPs

Sample IPs from the class C 57.144.139

57.144.139.54	View precise location of 57.144.139.54 on the map!
57.144.139.243	View precise location of 57.144.139.243 on the map!
57.144.139.174	View precise location of 57.144.139.174 on the map!
57.144.139.250	View precise location of 57.144.139.250 on the map!
57.144.139.138	View precise location of 57.144.139.138 on the map!
57.144.139.136	View precise location of 57.144.139.136 on the map!
57.144.139.152	View precise location of 57.144.139.152 on the map!
57.144.139.209	View precise location of 57.144.139.209 on the map!
57.144.139.192	View precise location of 57.144.139.192 on the map!
57.144.139.82	View precise location of 57.144.139.82 on the map!
57.144.139.43	View precise location of 57.144.139.43 on the map!

10 Random IPs

48.5.73.222	Find precise map location of 48.5.73.222
101.138.48.113	Find precise map location of 101.138.48.113
136.55.252.47	Find precise map location of 136.55.252.47
255.33.16.57	Find precise map location of 255.33.16.57
53.234.163.101	Find precise map location of 53.234.163.101
65.189.179.220	Find precise map location of 65.189.179.220
17.226.90.102	Find precise map location of 17.226.90.102
253.233.96.41	Find precise map location of 253.233.96.41
234.230.36.42	Find precise map location of 234.230.36.42
198.100.170.238	Find precise map location of 198.100.170.238
148.59.250.238	Find precise map location of 148.59.250.238

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