166.21.110 is a class C of IPs

Sample IPs from the class C 166.21.110

166.21.110.2	View precise location of 166.21.110.2 on the map!
166.21.110.182	View precise location of 166.21.110.182 on the map!
166.21.110.140	View precise location of 166.21.110.140 on the map!
166.21.110.55	View precise location of 166.21.110.55 on the map!
166.21.110.219	View precise location of 166.21.110.219 on the map!
166.21.110.56	View precise location of 166.21.110.56 on the map!
166.21.110.170	View precise location of 166.21.110.170 on the map!
166.21.110.118	View precise location of 166.21.110.118 on the map!
166.21.110.235	View precise location of 166.21.110.235 on the map!
166.21.110.143	View precise location of 166.21.110.143 on the map!
166.21.110.105	View precise location of 166.21.110.105 on the map!

10 Random IPs

221.178.138.216	Find precise map location of 221.178.138.216
213.96.10.247	Find precise map location of 213.96.10.247
89.157.32.128	Find precise map location of 89.157.32.128
171.157.105.39	Find precise map location of 171.157.105.39
186.28.1.57	Find precise map location of 186.28.1.57
67.60.3.9	Find precise map location of 67.60.3.9
148.49.175.54	Find precise map location of 148.49.175.54
134.164.206.177	Find precise map location of 134.164.206.177
96.232.155.148	Find precise map location of 96.232.155.148
129.26.64.137	Find precise map location of 129.26.64.137
156.206.253.196	Find precise map location of 156.206.253.196

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