21.1.142 is a class C of IPs

Sample IPs from the class C 21.1.142

21.1.142.143	View precise location of 21.1.142.143 on the map!
21.1.142.154	View precise location of 21.1.142.154 on the map!
21.1.142.177	View precise location of 21.1.142.177 on the map!
21.1.142.225	View precise location of 21.1.142.225 on the map!
21.1.142.5	View precise location of 21.1.142.5 on the map!
21.1.142.142	View precise location of 21.1.142.142 on the map!
21.1.142.232	View precise location of 21.1.142.232 on the map!
21.1.142.104	View precise location of 21.1.142.104 on the map!
21.1.142.95	View precise location of 21.1.142.95 on the map!
21.1.142.94	View precise location of 21.1.142.94 on the map!
21.1.142.242	View precise location of 21.1.142.242 on the map!

10 Random IPs

150.131.245.24	Find precise map location of 150.131.245.24
180.70.246.190	Find precise map location of 180.70.246.190
240.193.203.66	Find precise map location of 240.193.203.66
105.97.86.254	Find precise map location of 105.97.86.254
217.50.61.116	Find precise map location of 217.50.61.116
36.53.68.159	Find precise map location of 36.53.68.159
67.164.143.171	Find precise map location of 67.164.143.171
106.148.95.65	Find precise map location of 106.148.95.65
56.52.160.90	Find precise map location of 56.52.160.90
177.201.46.182	Find precise map location of 177.201.46.182
70.98.255.174	Find precise map location of 70.98.255.174

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