239.153.21 is a class C of IPs

Sample IPs from the class C 239.153.21

239.153.21.154	View precise location of 239.153.21.154 on the map!
239.153.21.77	View precise location of 239.153.21.77 on the map!
239.153.21.30	View precise location of 239.153.21.30 on the map!
239.153.21.194	View precise location of 239.153.21.194 on the map!
239.153.21.225	View precise location of 239.153.21.225 on the map!
239.153.21.163	View precise location of 239.153.21.163 on the map!
239.153.21.247	View precise location of 239.153.21.247 on the map!
239.153.21.210	View precise location of 239.153.21.210 on the map!
239.153.21.148	View precise location of 239.153.21.148 on the map!
239.153.21.121	View precise location of 239.153.21.121 on the map!
239.153.21.117	View precise location of 239.153.21.117 on the map!

10 Random IPs

67.161.21.119	Find precise map location of 67.161.21.119
232.189.254.9	Find precise map location of 232.189.254.9
73.137.45.219	Find precise map location of 73.137.45.219
114.14.57.226	Find precise map location of 114.14.57.226
129.116.194.89	Find precise map location of 129.116.194.89
196.141.182.170	Find precise map location of 196.141.182.170
210.224.161.91	Find precise map location of 210.224.161.91
137.116.27.69	Find precise map location of 137.116.27.69
216.41.129.123	Find precise map location of 216.41.129.123
51.120.87.139	Find precise map location of 51.120.87.139
98.67.15.53	Find precise map location of 98.67.15.53

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