127.21.255 is a class C of IPs

Sample IPs from the class C 127.21.255

127.21.255.60	View precise location of 127.21.255.60 on the map!
127.21.255.94	View precise location of 127.21.255.94 on the map!
127.21.255.23	View precise location of 127.21.255.23 on the map!
127.21.255.241	View precise location of 127.21.255.241 on the map!
127.21.255.10	View precise location of 127.21.255.10 on the map!
127.21.255.14	View precise location of 127.21.255.14 on the map!
127.21.255.193	View precise location of 127.21.255.193 on the map!
127.21.255.54	View precise location of 127.21.255.54 on the map!
127.21.255.88	View precise location of 127.21.255.88 on the map!
127.21.255.13	View precise location of 127.21.255.13 on the map!
127.21.255.165	View precise location of 127.21.255.165 on the map!

10 Random IPs

30.9.76.204	Find precise map location of 30.9.76.204
182.225.4.84	Find precise map location of 182.225.4.84
71.90.227.24	Find precise map location of 71.90.227.24
131.14.178.218	Find precise map location of 131.14.178.218
227.133.245.170	Find precise map location of 227.133.245.170
139.249.42.117	Find precise map location of 139.249.42.117
68.27.39.112	Find precise map location of 68.27.39.112
51.39.190.167	Find precise map location of 51.39.190.167
25.216.3.46	Find precise map location of 25.216.3.46
199.184.243.48	Find precise map location of 199.184.243.48
122.144.96.122	Find precise map location of 122.144.96.122

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