13.21 is a class B of IPs

Sample IPs from the class B 13.21

13.21.122.116	View precise location of 13.21.122.116 on the map!
13.21.66.253	View precise location of 13.21.66.253 on the map!
13.21.176.91	View precise location of 13.21.176.91 on the map!
13.21.78.64	View precise location of 13.21.78.64 on the map!
13.21.139.77	View precise location of 13.21.139.77 on the map!
13.21.197.5	View precise location of 13.21.197.5 on the map!
13.21.145.43	View precise location of 13.21.145.43 on the map!
13.21.68.115	View precise location of 13.21.68.115 on the map!
13.21.149.72	View precise location of 13.21.149.72 on the map!
13.21.138.227	View precise location of 13.21.138.227 on the map!
13.21.249.17	View precise location of 13.21.249.17 on the map!

10 Random IPs

124.73.16.13	Find precise map location of 124.73.16.13
200.98.106.170	Find precise map location of 200.98.106.170
241.201.236.92	Find precise map location of 241.201.236.92
223.93.55.90	Find precise map location of 223.93.55.90
135.200.240.15	Find precise map location of 135.200.240.15
80.175.68.144	Find precise map location of 80.175.68.144
141.162.148.197	Find precise map location of 141.162.148.197
119.142.103.192	Find precise map location of 119.142.103.192
131.220.226.47	Find precise map location of 131.220.226.47
78.95.164.91	Find precise map location of 78.95.164.91
193.38.63.101	Find precise map location of 193.38.63.101

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