216.101.21 is a class C of IPs

Sample IPs from the class C 216.101.21

216.101.21.124	View precise location of 216.101.21.124 on the map!
216.101.21.210	View precise location of 216.101.21.210 on the map!
216.101.21.255	View precise location of 216.101.21.255 on the map!
216.101.21.202	View precise location of 216.101.21.202 on the map!
216.101.21.111	View precise location of 216.101.21.111 on the map!
216.101.21.187	View precise location of 216.101.21.187 on the map!
216.101.21.50	View precise location of 216.101.21.50 on the map!
216.101.21.176	View precise location of 216.101.21.176 on the map!
216.101.21.74	View precise location of 216.101.21.74 on the map!
216.101.21.151	View precise location of 216.101.21.151 on the map!
216.101.21.170	View precise location of 216.101.21.170 on the map!

10 Random IPs

71.132.58.49	Find precise map location of 71.132.58.49
97.131.25.42	Find precise map location of 97.131.25.42
251.162.232.225	Find precise map location of 251.162.232.225
83.5.73.66	Find precise map location of 83.5.73.66
120.248.154.69	Find precise map location of 120.248.154.69
83.217.110.52	Find precise map location of 83.217.110.52
3.188.66.194	Find precise map location of 3.188.66.194
48.156.141.156	Find precise map location of 48.156.141.156
224.28.149.162	Find precise map location of 224.28.149.162
127.129.211.172	Find precise map location of 127.129.211.172
188.248.113.93	Find precise map location of 188.248.113.93

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