145.21.203 is a class C of IPs

Sample IPs from the class C 145.21.203

145.21.203.24	View precise location of 145.21.203.24 on the map!
145.21.203.160	View precise location of 145.21.203.160 on the map!
145.21.203.215	View precise location of 145.21.203.215 on the map!
145.21.203.118	View precise location of 145.21.203.118 on the map!
145.21.203.72	View precise location of 145.21.203.72 on the map!
145.21.203.144	View precise location of 145.21.203.144 on the map!
145.21.203.129	View precise location of 145.21.203.129 on the map!
145.21.203.181	View precise location of 145.21.203.181 on the map!
145.21.203.13	View precise location of 145.21.203.13 on the map!
145.21.203.108	View precise location of 145.21.203.108 on the map!
145.21.203.82	View precise location of 145.21.203.82 on the map!

10 Random IPs

28.76.87.8	Find precise map location of 28.76.87.8
250.209.14.8	Find precise map location of 250.209.14.8
64.39.134.151	Find precise map location of 64.39.134.151
243.203.48.137	Find precise map location of 243.203.48.137
121.57.17.212	Find precise map location of 121.57.17.212
112.157.236.162	Find precise map location of 112.157.236.162
183.163.36.37	Find precise map location of 183.163.36.37
122.138.55.222	Find precise map location of 122.138.55.222
250.201.255.124	Find precise map location of 250.201.255.124
12.144.18.62	Find precise map location of 12.144.18.62
143.86.85.18	Find precise map location of 143.86.85.18

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