51.100.138 is a class C of IPs

Sample IPs from the class C 51.100.138

51.100.138.228	View precise location of 51.100.138.228 on the map!
51.100.138.223	View precise location of 51.100.138.223 on the map!
51.100.138.101	View precise location of 51.100.138.101 on the map!
51.100.138.231	View precise location of 51.100.138.231 on the map!
51.100.138.118	View precise location of 51.100.138.118 on the map!
51.100.138.172	View precise location of 51.100.138.172 on the map!
51.100.138.22	View precise location of 51.100.138.22 on the map!
51.100.138.142	View precise location of 51.100.138.142 on the map!
51.100.138.73	View precise location of 51.100.138.73 on the map!
51.100.138.90	View precise location of 51.100.138.90 on the map!
51.100.138.80	View precise location of 51.100.138.80 on the map!

10 Random IPs

10.183.104.22	Find precise map location of 10.183.104.22
137.223.242.222	Find precise map location of 137.223.242.222
201.255.198.91	Find precise map location of 201.255.198.91
195.58.237.51	Find precise map location of 195.58.237.51
208.127.137.177	Find precise map location of 208.127.137.177
194.50.63.29	Find precise map location of 194.50.63.29
163.186.98.97	Find precise map location of 163.186.98.97
204.62.180.12	Find precise map location of 204.62.180.12
148.62.32.70	Find precise map location of 148.62.32.70
116.16.143.44	Find precise map location of 116.16.143.44
77.191.91.150	Find precise map location of 77.191.91.150

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