151.81.40 is a class C of IPs

Sample IPs from the class C 151.81.40

151.81.40.51	View precise location of 151.81.40.51 on the map!
151.81.40.43	View precise location of 151.81.40.43 on the map!
151.81.40.66	View precise location of 151.81.40.66 on the map!
151.81.40.226	View precise location of 151.81.40.226 on the map!
151.81.40.144	View precise location of 151.81.40.144 on the map!
151.81.40.114	View precise location of 151.81.40.114 on the map!
151.81.40.101	View precise location of 151.81.40.101 on the map!
151.81.40.146	View precise location of 151.81.40.146 on the map!
151.81.40.46	View precise location of 151.81.40.46 on the map!
151.81.40.139	View precise location of 151.81.40.139 on the map!
151.81.40.49	View precise location of 151.81.40.49 on the map!

10 Random IPs

171.5.209.193	Find precise map location of 171.5.209.193
4.121.209.39	Find precise map location of 4.121.209.39
228.241.205.134	Find precise map location of 228.241.205.134
240.187.236.38	Find precise map location of 240.187.236.38
106.65.60.57	Find precise map location of 106.65.60.57
8.37.236.167	Find precise map location of 8.37.236.167
142.247.45.74	Find precise map location of 142.247.45.74
223.191.140.27	Find precise map location of 223.191.140.27
94.255.84.247	Find precise map location of 94.255.84.247
37.249.246.114	Find precise map location of 37.249.246.114
200.251.54.103	Find precise map location of 200.251.54.103

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