164.57.21 is a class C of IPs

Sample IPs from the class C 164.57.21

164.57.21.68	View precise location of 164.57.21.68 on the map!
164.57.21.15	View precise location of 164.57.21.15 on the map!
164.57.21.182	View precise location of 164.57.21.182 on the map!
164.57.21.161	View precise location of 164.57.21.161 on the map!
164.57.21.236	View precise location of 164.57.21.236 on the map!
164.57.21.14	View precise location of 164.57.21.14 on the map!
164.57.21.172	View precise location of 164.57.21.172 on the map!
164.57.21.78	View precise location of 164.57.21.78 on the map!
164.57.21.188	View precise location of 164.57.21.188 on the map!
164.57.21.228	View precise location of 164.57.21.228 on the map!
164.57.21.18	View precise location of 164.57.21.18 on the map!

10 Random IPs

40.251.254.111	Find precise map location of 40.251.254.111
224.38.148.59	Find precise map location of 224.38.148.59
168.165.19.217	Find precise map location of 168.165.19.217
222.116.219.224	Find precise map location of 222.116.219.224
241.60.91.126	Find precise map location of 241.60.91.126
200.22.3.152	Find precise map location of 200.22.3.152
65.245.55.110	Find precise map location of 65.245.55.110
151.191.70.159	Find precise map location of 151.191.70.159
190.29.152.209	Find precise map location of 190.29.152.209
78.211.55.17	Find precise map location of 78.211.55.17
99.180.164.176	Find precise map location of 99.180.164.176

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