53.145.21 is a class C of IPs

Sample IPs from the class C 53.145.21

53.145.21.183	View precise location of 53.145.21.183 on the map!
53.145.21.34	View precise location of 53.145.21.34 on the map!
53.145.21.200	View precise location of 53.145.21.200 on the map!
53.145.21.199	View precise location of 53.145.21.199 on the map!
53.145.21.153	View precise location of 53.145.21.153 on the map!
53.145.21.232	View precise location of 53.145.21.232 on the map!
53.145.21.125	View precise location of 53.145.21.125 on the map!
53.145.21.237	View precise location of 53.145.21.237 on the map!
53.145.21.182	View precise location of 53.145.21.182 on the map!
53.145.21.234	View precise location of 53.145.21.234 on the map!
53.145.21.54	View precise location of 53.145.21.54 on the map!

10 Random IPs

137.52.240.243	Find precise map location of 137.52.240.243
133.78.12.115	Find precise map location of 133.78.12.115
95.233.91.245	Find precise map location of 95.233.91.245
240.136.39.193	Find precise map location of 240.136.39.193
51.125.228.120	Find precise map location of 51.125.228.120
32.182.249.40	Find precise map location of 32.182.249.40
58.240.134.27	Find precise map location of 58.240.134.27
229.212.85.72	Find precise map location of 229.212.85.72
116.94.43.220	Find precise map location of 116.94.43.220
13.241.192.123	Find precise map location of 13.241.192.123
110.73.100.239	Find precise map location of 110.73.100.239

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