137.21.14 is a class C of IPs

Sample IPs from the class C 137.21.14

137.21.14.207	View precise location of 137.21.14.207 on the map!
137.21.14.226	View precise location of 137.21.14.226 on the map!
137.21.14.75	View precise location of 137.21.14.75 on the map!
137.21.14.146	View precise location of 137.21.14.146 on the map!
137.21.14.117	View precise location of 137.21.14.117 on the map!
137.21.14.110	View precise location of 137.21.14.110 on the map!
137.21.14.104	View precise location of 137.21.14.104 on the map!
137.21.14.213	View precise location of 137.21.14.213 on the map!
137.21.14.24	View precise location of 137.21.14.24 on the map!
137.21.14.130	View precise location of 137.21.14.130 on the map!
137.21.14.83	View precise location of 137.21.14.83 on the map!

10 Random IPs

161.214.128.240	Find precise map location of 161.214.128.240
105.143.163.229	Find precise map location of 105.143.163.229
142.56.201.118	Find precise map location of 142.56.201.118
63.179.144.187	Find precise map location of 63.179.144.187
150.47.116.81	Find precise map location of 150.47.116.81
92.136.1.93	Find precise map location of 92.136.1.93
198.106.183.64	Find precise map location of 198.106.183.64
149.31.38.86	Find precise map location of 149.31.38.86
57.209.128.110	Find precise map location of 57.209.128.110
171.218.165.115	Find precise map location of 171.218.165.115
152.98.30.231	Find precise map location of 152.98.30.231

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