138.166.87 is a class C of IPs

Sample IPs from the class C 138.166.87

138.166.87.84	View precise location of 138.166.87.84 on the map!
138.166.87.23	View precise location of 138.166.87.23 on the map!
138.166.87.92	View precise location of 138.166.87.92 on the map!
138.166.87.91	View precise location of 138.166.87.91 on the map!
138.166.87.191	View precise location of 138.166.87.191 on the map!
138.166.87.237	View precise location of 138.166.87.237 on the map!
138.166.87.45	View precise location of 138.166.87.45 on the map!
138.166.87.12	View precise location of 138.166.87.12 on the map!
138.166.87.38	View precise location of 138.166.87.38 on the map!
138.166.87.213	View precise location of 138.166.87.213 on the map!
138.166.87.132	View precise location of 138.166.87.132 on the map!

10 Random IPs

221.98.241.248	Find precise map location of 221.98.241.248
103.46.13.38	Find precise map location of 103.46.13.38
68.193.148.159	Find precise map location of 68.193.148.159
152.29.46.69	Find precise map location of 152.29.46.69
87.104.219.250	Find precise map location of 87.104.219.250
103.115.115.49	Find precise map location of 103.115.115.49
164.177.91.24	Find precise map location of 164.177.91.24
61.72.144.147	Find precise map location of 61.72.144.147
14.246.134.125	Find precise map location of 14.246.134.125
77.211.70.35	Find precise map location of 77.211.70.35
116.88.195.30	Find precise map location of 116.88.195.30

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