158.17.21 is a class C of IPs

Sample IPs from the class C 158.17.21

158.17.21.28	View precise location of 158.17.21.28 on the map!
158.17.21.32	View precise location of 158.17.21.32 on the map!
158.17.21.33	View precise location of 158.17.21.33 on the map!
158.17.21.115	View precise location of 158.17.21.115 on the map!
158.17.21.86	View precise location of 158.17.21.86 on the map!
158.17.21.154	View precise location of 158.17.21.154 on the map!
158.17.21.245	View precise location of 158.17.21.245 on the map!
158.17.21.188	View precise location of 158.17.21.188 on the map!
158.17.21.96	View precise location of 158.17.21.96 on the map!
158.17.21.231	View precise location of 158.17.21.231 on the map!
158.17.21.39	View precise location of 158.17.21.39 on the map!

10 Random IPs

112.22.146.230	Find precise map location of 112.22.146.230
5.11.157.32	Find precise map location of 5.11.157.32
248.154.17.198	Find precise map location of 248.154.17.198
244.162.62.199	Find precise map location of 244.162.62.199
229.232.138.117	Find precise map location of 229.232.138.117
152.33.216.252	Find precise map location of 152.33.216.252
194.182.48.211	Find precise map location of 194.182.48.211
187.101.250.65	Find precise map location of 187.101.250.65
212.9.231.167	Find precise map location of 212.9.231.167
99.232.239.143	Find precise map location of 99.232.239.143
182.249.86.146	Find precise map location of 182.249.86.146

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