21.228.37 is a class C of IPs

Sample IPs from the class C 21.228.37

21.228.37.119	View precise location of 21.228.37.119 on the map!
21.228.37.122	View precise location of 21.228.37.122 on the map!
21.228.37.147	View precise location of 21.228.37.147 on the map!
21.228.37.58	View precise location of 21.228.37.58 on the map!
21.228.37.16	View precise location of 21.228.37.16 on the map!
21.228.37.199	View precise location of 21.228.37.199 on the map!
21.228.37.139	View precise location of 21.228.37.139 on the map!
21.228.37.59	View precise location of 21.228.37.59 on the map!
21.228.37.52	View precise location of 21.228.37.52 on the map!
21.228.37.56	View precise location of 21.228.37.56 on the map!
21.228.37.244	View precise location of 21.228.37.244 on the map!

10 Random IPs

242.106.165.157	Find precise map location of 242.106.165.157
244.144.120.206	Find precise map location of 244.144.120.206
159.161.57.142	Find precise map location of 159.161.57.142
214.182.42.40	Find precise map location of 214.182.42.40
111.6.52.188	Find precise map location of 111.6.52.188
178.171.181.190	Find precise map location of 178.171.181.190
70.160.194.221	Find precise map location of 70.160.194.221
126.153.197.101	Find precise map location of 126.153.197.101
1.230.30.151	Find precise map location of 1.230.30.151
254.109.173.201	Find precise map location of 254.109.173.201
87.143.34.90	Find precise map location of 87.143.34.90

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