21.213.28 is a class C of IPs

Sample IPs from the class C 21.213.28

21.213.28.82	View precise location of 21.213.28.82 on the map!
21.213.28.103	View precise location of 21.213.28.103 on the map!
21.213.28.251	View precise location of 21.213.28.251 on the map!
21.213.28.198	View precise location of 21.213.28.198 on the map!
21.213.28.113	View precise location of 21.213.28.113 on the map!
21.213.28.48	View precise location of 21.213.28.48 on the map!
21.213.28.200	View precise location of 21.213.28.200 on the map!
21.213.28.228	View precise location of 21.213.28.228 on the map!
21.213.28.121	View precise location of 21.213.28.121 on the map!
21.213.28.17	View precise location of 21.213.28.17 on the map!
21.213.28.229	View precise location of 21.213.28.229 on the map!

10 Random IPs

36.249.63.103	Find precise map location of 36.249.63.103
137.77.133.171	Find precise map location of 137.77.133.171
201.59.24.112	Find precise map location of 201.59.24.112
240.121.54.139	Find precise map location of 240.121.54.139
23.185.226.200	Find precise map location of 23.185.226.200
164.40.16.221	Find precise map location of 164.40.16.221
176.112.217.222	Find precise map location of 176.112.217.222
179.35.9.19	Find precise map location of 179.35.9.19
92.75.122.171	Find precise map location of 92.75.122.171
1.59.234.8	Find precise map location of 1.59.234.8
141.128.224.186	Find precise map location of 141.128.224.186

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