51.2.57 is a class C of IPs

Sample IPs from the class C 51.2.57

51.2.57.182	View precise location of 51.2.57.182 on the map!
51.2.57.134	View precise location of 51.2.57.134 on the map!
51.2.57.244	View precise location of 51.2.57.244 on the map!
51.2.57.189	View precise location of 51.2.57.189 on the map!
51.2.57.68	View precise location of 51.2.57.68 on the map!
51.2.57.109	View precise location of 51.2.57.109 on the map!
51.2.57.77	View precise location of 51.2.57.77 on the map!
51.2.57.16	View precise location of 51.2.57.16 on the map!
51.2.57.68	View precise location of 51.2.57.68 on the map!
51.2.57.25	View precise location of 51.2.57.25 on the map!
51.2.57.44	View precise location of 51.2.57.44 on the map!

10 Random IPs

144.206.73.83	Find precise map location of 144.206.73.83
196.157.164.63	Find precise map location of 196.157.164.63
135.20.213.181	Find precise map location of 135.20.213.181
144.140.178.9	Find precise map location of 144.140.178.9
101.254.230.112	Find precise map location of 101.254.230.112
45.194.193.169	Find precise map location of 45.194.193.169
159.225.153.179	Find precise map location of 159.225.153.179
181.43.97.250	Find precise map location of 181.43.97.250
3.121.38.2	Find precise map location of 3.121.38.2
6.7.99.37	Find precise map location of 6.7.99.37
210.134.187.138	Find precise map location of 210.134.187.138

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