159.21.20 is a class C of IPs

Sample IPs from the class C 159.21.20

159.21.20.59	View precise location of 159.21.20.59 on the map!
159.21.20.244	View precise location of 159.21.20.244 on the map!
159.21.20.25	View precise location of 159.21.20.25 on the map!
159.21.20.139	View precise location of 159.21.20.139 on the map!
159.21.20.66	View precise location of 159.21.20.66 on the map!
159.21.20.179	View precise location of 159.21.20.179 on the map!
159.21.20.182	View precise location of 159.21.20.182 on the map!
159.21.20.219	View precise location of 159.21.20.219 on the map!
159.21.20.233	View precise location of 159.21.20.233 on the map!
159.21.20.61	View precise location of 159.21.20.61 on the map!
159.21.20.206	View precise location of 159.21.20.206 on the map!

10 Random IPs

46.146.153.206	Find precise map location of 46.146.153.206
104.243.112.157	Find precise map location of 104.243.112.157
31.162.99.53	Find precise map location of 31.162.99.53
176.177.13.64	Find precise map location of 176.177.13.64
128.84.206.95	Find precise map location of 128.84.206.95
133.197.239.62	Find precise map location of 133.197.239.62
164.138.24.43	Find precise map location of 164.138.24.43
156.61.104.90	Find precise map location of 156.61.104.90
243.151.232.74	Find precise map location of 243.151.232.74
171.120.58.27	Find precise map location of 171.120.58.27
98.148.105.240	Find precise map location of 98.148.105.240

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