21.231.99 is a class C of IPs

Sample IPs from the class C 21.231.99

21.231.99.117	View precise location of 21.231.99.117 on the map!
21.231.99.199	View precise location of 21.231.99.199 on the map!
21.231.99.195	View precise location of 21.231.99.195 on the map!
21.231.99.160	View precise location of 21.231.99.160 on the map!
21.231.99.79	View precise location of 21.231.99.79 on the map!
21.231.99.225	View precise location of 21.231.99.225 on the map!
21.231.99.3	View precise location of 21.231.99.3 on the map!
21.231.99.2	View precise location of 21.231.99.2 on the map!
21.231.99.103	View precise location of 21.231.99.103 on the map!
21.231.99.30	View precise location of 21.231.99.30 on the map!
21.231.99.195	View precise location of 21.231.99.195 on the map!

10 Random IPs

39.222.172.94	Find precise map location of 39.222.172.94
94.77.153.144	Find precise map location of 94.77.153.144
198.254.15.70	Find precise map location of 198.254.15.70
222.76.194.166	Find precise map location of 222.76.194.166
255.251.233.204	Find precise map location of 255.251.233.204
172.107.204.126	Find precise map location of 172.107.204.126
138.34.7.212	Find precise map location of 138.34.7.212
150.68.13.229	Find precise map location of 150.68.13.229
205.124.250.228	Find precise map location of 205.124.250.228
240.221.80.129	Find precise map location of 240.221.80.129
235.38.129.128	Find precise map location of 235.38.129.128

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