138.206.57 is a class C of IPs

Sample IPs from the class C 138.206.57

138.206.57.150	View precise location of 138.206.57.150 on the map!
138.206.57.189	View precise location of 138.206.57.189 on the map!
138.206.57.137	View precise location of 138.206.57.137 on the map!
138.206.57.191	View precise location of 138.206.57.191 on the map!
138.206.57.6	View precise location of 138.206.57.6 on the map!
138.206.57.231	View precise location of 138.206.57.231 on the map!
138.206.57.76	View precise location of 138.206.57.76 on the map!
138.206.57.133	View precise location of 138.206.57.133 on the map!
138.206.57.207	View precise location of 138.206.57.207 on the map!
138.206.57.19	View precise location of 138.206.57.19 on the map!
138.206.57.168	View precise location of 138.206.57.168 on the map!

10 Random IPs

167.82.4.213	Find precise map location of 167.82.4.213
169.43.222.195	Find precise map location of 169.43.222.195
163.239.195.206	Find precise map location of 163.239.195.206
208.38.162.3	Find precise map location of 208.38.162.3
221.41.83.97	Find precise map location of 221.41.83.97
100.133.161.27	Find precise map location of 100.133.161.27
60.45.115.71	Find precise map location of 60.45.115.71
85.57.155.180	Find precise map location of 85.57.155.180
234.43.100.224	Find precise map location of 234.43.100.224
43.66.135.150	Find precise map location of 43.66.135.150
253.146.135.24	Find precise map location of 253.146.135.24

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