21.166.213 is a class C of IPs

Sample IPs from the class C 21.166.213

21.166.213.53	View precise location of 21.166.213.53 on the map!
21.166.213.173	View precise location of 21.166.213.173 on the map!
21.166.213.123	View precise location of 21.166.213.123 on the map!
21.166.213.28	View precise location of 21.166.213.28 on the map!
21.166.213.157	View precise location of 21.166.213.157 on the map!
21.166.213.229	View precise location of 21.166.213.229 on the map!
21.166.213.22	View precise location of 21.166.213.22 on the map!
21.166.213.119	View precise location of 21.166.213.119 on the map!
21.166.213.10	View precise location of 21.166.213.10 on the map!
21.166.213.203	View precise location of 21.166.213.203 on the map!
21.166.213.240	View precise location of 21.166.213.240 on the map!

10 Random IPs

161.86.13.139	Find precise map location of 161.86.13.139
3.183.252.159	Find precise map location of 3.183.252.159
173.174.178.239	Find precise map location of 173.174.178.239
12.197.227.227	Find precise map location of 12.197.227.227
14.34.19.81	Find precise map location of 14.34.19.81
203.81.228.114	Find precise map location of 203.81.228.114
207.122.141.222	Find precise map location of 207.122.141.222
87.91.154.159	Find precise map location of 87.91.154.159
99.49.229.77	Find precise map location of 99.49.229.77
60.13.223.25	Find precise map location of 60.13.223.25
255.251.254.105	Find precise map location of 255.251.254.105

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