51.142.137 is a class C of IPs

Sample IPs from the class C 51.142.137

51.142.137.221	View precise location of 51.142.137.221 on the map!
51.142.137.220	View precise location of 51.142.137.220 on the map!
51.142.137.140	View precise location of 51.142.137.140 on the map!
51.142.137.95	View precise location of 51.142.137.95 on the map!
51.142.137.67	View precise location of 51.142.137.67 on the map!
51.142.137.34	View precise location of 51.142.137.34 on the map!
51.142.137.20	View precise location of 51.142.137.20 on the map!
51.142.137.52	View precise location of 51.142.137.52 on the map!
51.142.137.103	View precise location of 51.142.137.103 on the map!
51.142.137.46	View precise location of 51.142.137.46 on the map!
51.142.137.118	View precise location of 51.142.137.118 on the map!

10 Random IPs

177.28.185.140	Find precise map location of 177.28.185.140
201.235.211.34	Find precise map location of 201.235.211.34
231.63.45.179	Find precise map location of 231.63.45.179
86.137.79.205	Find precise map location of 86.137.79.205
22.255.57.226	Find precise map location of 22.255.57.226
119.79.79.142	Find precise map location of 119.79.79.142
82.112.18.163	Find precise map location of 82.112.18.163
150.13.193.108	Find precise map location of 150.13.193.108
94.3.85.225	Find precise map location of 94.3.85.225
236.93.15.205	Find precise map location of 236.93.15.205
31.51.141.20	Find precise map location of 31.51.141.20

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