139.251.18 is a class C of IPs

Sample IPs from the class C 139.251.18

139.251.18.38	View precise location of 139.251.18.38 on the map!
139.251.18.74	View precise location of 139.251.18.74 on the map!
139.251.18.200	View precise location of 139.251.18.200 on the map!
139.251.18.100	View precise location of 139.251.18.100 on the map!
139.251.18.90	View precise location of 139.251.18.90 on the map!
139.251.18.20	View precise location of 139.251.18.20 on the map!
139.251.18.51	View precise location of 139.251.18.51 on the map!
139.251.18.84	View precise location of 139.251.18.84 on the map!
139.251.18.38	View precise location of 139.251.18.38 on the map!
139.251.18.11	View precise location of 139.251.18.11 on the map!
139.251.18.48	View precise location of 139.251.18.48 on the map!

10 Random IPs

254.150.185.108	Find precise map location of 254.150.185.108
7.33.200.32	Find precise map location of 7.33.200.32
127.117.185.152	Find precise map location of 127.117.185.152
107.156.109.221	Find precise map location of 107.156.109.221
245.131.101.178	Find precise map location of 245.131.101.178
195.142.246.142	Find precise map location of 195.142.246.142
115.241.226.139	Find precise map location of 115.241.226.139
16.158.167.11	Find precise map location of 16.158.167.11
35.132.125.77	Find precise map location of 35.132.125.77
216.225.235.16	Find precise map location of 216.225.235.16
134.236.143.237	Find precise map location of 134.236.143.237

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