158.173.21 is a class C of IPs

Sample IPs from the class C 158.173.21

158.173.21.32	View precise location of 158.173.21.32 on the map!
158.173.21.178	View precise location of 158.173.21.178 on the map!
158.173.21.181	View precise location of 158.173.21.181 on the map!
158.173.21.43	View precise location of 158.173.21.43 on the map!
158.173.21.150	View precise location of 158.173.21.150 on the map!
158.173.21.80	View precise location of 158.173.21.80 on the map!
158.173.21.12	View precise location of 158.173.21.12 on the map!
158.173.21.219	View precise location of 158.173.21.219 on the map!
158.173.21.254	View precise location of 158.173.21.254 on the map!
158.173.21.228	View precise location of 158.173.21.228 on the map!
158.173.21.72	View precise location of 158.173.21.72 on the map!

10 Random IPs

128.195.234.23	Find precise map location of 128.195.234.23
103.142.86.234	Find precise map location of 103.142.86.234
183.221.175.33	Find precise map location of 183.221.175.33
16.210.37.241	Find precise map location of 16.210.37.241
35.16.137.107	Find precise map location of 35.16.137.107
72.138.114.141	Find precise map location of 72.138.114.141
42.168.6.104	Find precise map location of 42.168.6.104
68.244.185.201	Find precise map location of 68.244.185.201
121.95.6.183	Find precise map location of 121.95.6.183
249.102.247.37	Find precise map location of 249.102.247.37
212.120.43.167	Find precise map location of 212.120.43.167

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