199.51.18 is a class C of IPs

Sample IPs from the class C 199.51.18

199.51.18.230	View precise location of 199.51.18.230 on the map!
199.51.18.160	View precise location of 199.51.18.160 on the map!
199.51.18.61	View precise location of 199.51.18.61 on the map!
199.51.18.224	View precise location of 199.51.18.224 on the map!
199.51.18.41	View precise location of 199.51.18.41 on the map!
199.51.18.241	View precise location of 199.51.18.241 on the map!
199.51.18.150	View precise location of 199.51.18.150 on the map!
199.51.18.10	View precise location of 199.51.18.10 on the map!
199.51.18.132	View precise location of 199.51.18.132 on the map!
199.51.18.178	View precise location of 199.51.18.178 on the map!
199.51.18.212	View precise location of 199.51.18.212 on the map!

10 Random IPs

85.157.29.18	Find precise map location of 85.157.29.18
88.238.58.141	Find precise map location of 88.238.58.141
232.216.182.128	Find precise map location of 232.216.182.128
210.13.29.77	Find precise map location of 210.13.29.77
112.107.183.23	Find precise map location of 112.107.183.23
133.155.148.111	Find precise map location of 133.155.148.111
91.58.244.81	Find precise map location of 91.58.244.81
93.41.195.212	Find precise map location of 93.41.195.212
97.98.1.35	Find precise map location of 97.98.1.35
95.242.43.202	Find precise map location of 95.242.43.202
78.22.1.41	Find precise map location of 78.22.1.41

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