255.2.21 is a class C of IPs

Sample IPs from the class C 255.2.21

255.2.21.70	View precise location of 255.2.21.70 on the map!
255.2.21.154	View precise location of 255.2.21.154 on the map!
255.2.21.204	View precise location of 255.2.21.204 on the map!
255.2.21.192	View precise location of 255.2.21.192 on the map!
255.2.21.79	View precise location of 255.2.21.79 on the map!
255.2.21.254	View precise location of 255.2.21.254 on the map!
255.2.21.92	View precise location of 255.2.21.92 on the map!
255.2.21.54	View precise location of 255.2.21.54 on the map!
255.2.21.65	View precise location of 255.2.21.65 on the map!
255.2.21.75	View precise location of 255.2.21.75 on the map!
255.2.21.15	View precise location of 255.2.21.15 on the map!

10 Random IPs

85.168.32.2	Find precise map location of 85.168.32.2
76.38.239.104	Find precise map location of 76.38.239.104
116.110.164.106	Find precise map location of 116.110.164.106
239.90.141.93	Find precise map location of 239.90.141.93
128.197.73.249	Find precise map location of 128.197.73.249
235.68.55.51	Find precise map location of 235.68.55.51
110.36.191.99	Find precise map location of 110.36.191.99
207.192.10.29	Find precise map location of 207.192.10.29
66.82.109.153	Find precise map location of 66.82.109.153
83.23.250.244	Find precise map location of 83.23.250.244
212.237.61.90	Find precise map location of 212.237.61.90

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