51.172.80 is a class C of IPs

Sample IPs from the class C 51.172.80

51.172.80.72	View precise location of 51.172.80.72 on the map!
51.172.80.113	View precise location of 51.172.80.113 on the map!
51.172.80.128	View precise location of 51.172.80.128 on the map!
51.172.80.148	View precise location of 51.172.80.148 on the map!
51.172.80.65	View precise location of 51.172.80.65 on the map!
51.172.80.121	View precise location of 51.172.80.121 on the map!
51.172.80.93	View precise location of 51.172.80.93 on the map!
51.172.80.80	View precise location of 51.172.80.80 on the map!
51.172.80.253	View precise location of 51.172.80.253 on the map!
51.172.80.32	View precise location of 51.172.80.32 on the map!
51.172.80.43	View precise location of 51.172.80.43 on the map!

10 Random IPs

139.77.219.72	Find precise map location of 139.77.219.72
56.201.254.63	Find precise map location of 56.201.254.63
13.54.182.116	Find precise map location of 13.54.182.116
233.108.225.110	Find precise map location of 233.108.225.110
38.45.193.109	Find precise map location of 38.45.193.109
211.47.225.201	Find precise map location of 211.47.225.201
255.190.175.59	Find precise map location of 255.190.175.59
131.14.159.191	Find precise map location of 131.14.159.191
198.190.114.198	Find precise map location of 198.190.114.198
121.47.5.103	Find precise map location of 121.47.5.103
248.247.74.242	Find precise map location of 248.247.74.242

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