151.87.221 is a class C of IPs

Sample IPs from the class C 151.87.221

151.87.221.123	View precise location of 151.87.221.123 on the map!
151.87.221.194	View precise location of 151.87.221.194 on the map!
151.87.221.78	View precise location of 151.87.221.78 on the map!
151.87.221.21	View precise location of 151.87.221.21 on the map!
151.87.221.27	View precise location of 151.87.221.27 on the map!
151.87.221.54	View precise location of 151.87.221.54 on the map!
151.87.221.89	View precise location of 151.87.221.89 on the map!
151.87.221.7	View precise location of 151.87.221.7 on the map!
151.87.221.213	View precise location of 151.87.221.213 on the map!
151.87.221.163	View precise location of 151.87.221.163 on the map!
151.87.221.221	View precise location of 151.87.221.221 on the map!

10 Random IPs

217.54.127.123	Find precise map location of 217.54.127.123
78.101.10.64	Find precise map location of 78.101.10.64
249.138.50.253	Find precise map location of 249.138.50.253
103.25.94.45	Find precise map location of 103.25.94.45
132.136.150.136	Find precise map location of 132.136.150.136
193.33.21.119	Find precise map location of 193.33.21.119
10.165.142.43	Find precise map location of 10.165.142.43
93.91.100.69	Find precise map location of 93.91.100.69
58.20.21.30	Find precise map location of 58.20.21.30
95.87.229.102	Find precise map location of 95.87.229.102
112.132.205.155	Find precise map location of 112.132.205.155

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