21.158.156 is a class C of IPs

Sample IPs from the class C 21.158.156

21.158.156.100	View precise location of 21.158.156.100 on the map!
21.158.156.196	View precise location of 21.158.156.196 on the map!
21.158.156.115	View precise location of 21.158.156.115 on the map!
21.158.156.126	View precise location of 21.158.156.126 on the map!
21.158.156.163	View precise location of 21.158.156.163 on the map!
21.158.156.235	View precise location of 21.158.156.235 on the map!
21.158.156.6	View precise location of 21.158.156.6 on the map!
21.158.156.107	View precise location of 21.158.156.107 on the map!
21.158.156.12	View precise location of 21.158.156.12 on the map!
21.158.156.99	View precise location of 21.158.156.99 on the map!
21.158.156.4	View precise location of 21.158.156.4 on the map!

10 Random IPs

245.9.215.232	Find precise map location of 245.9.215.232
203.28.21.142	Find precise map location of 203.28.21.142
17.90.253.153	Find precise map location of 17.90.253.153
88.52.80.38	Find precise map location of 88.52.80.38
234.189.176.20	Find precise map location of 234.189.176.20
42.55.86.191	Find precise map location of 42.55.86.191
62.4.6.85	Find precise map location of 62.4.6.85
48.248.96.129	Find precise map location of 48.248.96.129
119.49.193.173	Find precise map location of 119.49.193.173
130.164.208.108	Find precise map location of 130.164.208.108
215.249.3.103	Find precise map location of 215.249.3.103

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