21.20.72 is a class C of IPs

Sample IPs from the class C 21.20.72

21.20.72.205	View precise location of 21.20.72.205 on the map!
21.20.72.98	View precise location of 21.20.72.98 on the map!
21.20.72.197	View precise location of 21.20.72.197 on the map!
21.20.72.21	View precise location of 21.20.72.21 on the map!
21.20.72.53	View precise location of 21.20.72.53 on the map!
21.20.72.101	View precise location of 21.20.72.101 on the map!
21.20.72.121	View precise location of 21.20.72.121 on the map!
21.20.72.245	View precise location of 21.20.72.245 on the map!
21.20.72.183	View precise location of 21.20.72.183 on the map!
21.20.72.75	View precise location of 21.20.72.75 on the map!
21.20.72.206	View precise location of 21.20.72.206 on the map!

10 Random IPs

194.45.116.149	Find precise map location of 194.45.116.149
23.223.71.22	Find precise map location of 23.223.71.22
223.85.155.51	Find precise map location of 223.85.155.51
163.37.191.63	Find precise map location of 163.37.191.63
135.115.160.101	Find precise map location of 135.115.160.101
31.8.91.247	Find precise map location of 31.8.91.247
94.86.117.73	Find precise map location of 94.86.117.73
117.21.201.244	Find precise map location of 117.21.201.244
31.180.108.153	Find precise map location of 31.180.108.153
157.47.177.66	Find precise map location of 157.47.177.66
228.85.116.231	Find precise map location of 228.85.116.231

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