21.28.56 is a class C of IPs

Sample IPs from the class C 21.28.56

21.28.56.223	View precise location of 21.28.56.223 on the map!
21.28.56.88	View precise location of 21.28.56.88 on the map!
21.28.56.149	View precise location of 21.28.56.149 on the map!
21.28.56.126	View precise location of 21.28.56.126 on the map!
21.28.56.194	View precise location of 21.28.56.194 on the map!
21.28.56.196	View precise location of 21.28.56.196 on the map!
21.28.56.144	View precise location of 21.28.56.144 on the map!
21.28.56.16	View precise location of 21.28.56.16 on the map!
21.28.56.63	View precise location of 21.28.56.63 on the map!
21.28.56.44	View precise location of 21.28.56.44 on the map!
21.28.56.255	View precise location of 21.28.56.255 on the map!

10 Random IPs

70.137.66.96	Find precise map location of 70.137.66.96
100.205.165.155	Find precise map location of 100.205.165.155
57.96.170.11	Find precise map location of 57.96.170.11
18.242.203.10	Find precise map location of 18.242.203.10
119.46.196.8	Find precise map location of 119.46.196.8
13.71.77.10	Find precise map location of 13.71.77.10
55.133.232.157	Find precise map location of 55.133.232.157
178.51.51.144	Find precise map location of 178.51.51.144
40.76.226.207	Find precise map location of 40.76.226.207
116.56.98.172	Find precise map location of 116.56.98.172
99.187.217.118	Find precise map location of 99.187.217.118

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