57.100.28 is a class C of IPs

Sample IPs from the class C 57.100.28

57.100.28.223	View precise location of 57.100.28.223 on the map!
57.100.28.185	View precise location of 57.100.28.185 on the map!
57.100.28.253	View precise location of 57.100.28.253 on the map!
57.100.28.94	View precise location of 57.100.28.94 on the map!
57.100.28.200	View precise location of 57.100.28.200 on the map!
57.100.28.176	View precise location of 57.100.28.176 on the map!
57.100.28.26	View precise location of 57.100.28.26 on the map!
57.100.28.30	View precise location of 57.100.28.30 on the map!
57.100.28.117	View precise location of 57.100.28.117 on the map!
57.100.28.63	View precise location of 57.100.28.63 on the map!
57.100.28.21	View precise location of 57.100.28.21 on the map!

10 Random IPs

84.51.48.210	Find precise map location of 84.51.48.210
30.173.200.238	Find precise map location of 30.173.200.238
88.50.226.83	Find precise map location of 88.50.226.83
148.177.7.30	Find precise map location of 148.177.7.30
251.6.41.225	Find precise map location of 251.6.41.225
37.86.103.137	Find precise map location of 37.86.103.137
92.63.85.201	Find precise map location of 92.63.85.201
177.188.206.33	Find precise map location of 177.188.206.33
213.208.93.147	Find precise map location of 213.208.93.147
66.67.25.113	Find precise map location of 66.67.25.113
218.160.134.245	Find precise map location of 218.160.134.245

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