42.157.21 is a class C of IPs

Sample IPs from the class C 42.157.21

42.157.21.37	View precise location of 42.157.21.37 on the map!
42.157.21.230	View precise location of 42.157.21.230 on the map!
42.157.21.158	View precise location of 42.157.21.158 on the map!
42.157.21.177	View precise location of 42.157.21.177 on the map!
42.157.21.183	View precise location of 42.157.21.183 on the map!
42.157.21.242	View precise location of 42.157.21.242 on the map!
42.157.21.73	View precise location of 42.157.21.73 on the map!
42.157.21.31	View precise location of 42.157.21.31 on the map!
42.157.21.22	View precise location of 42.157.21.22 on the map!
42.157.21.116	View precise location of 42.157.21.116 on the map!
42.157.21.215	View precise location of 42.157.21.215 on the map!

10 Random IPs

137.17.30.81	Find precise map location of 137.17.30.81
15.179.245.222	Find precise map location of 15.179.245.222
137.39.210.197	Find precise map location of 137.39.210.197
230.246.140.153	Find precise map location of 230.246.140.153
230.68.178.93	Find precise map location of 230.68.178.93
25.194.134.120	Find precise map location of 25.194.134.120
35.118.175.205	Find precise map location of 35.118.175.205
69.185.139.204	Find precise map location of 69.185.139.204
4.241.201.112	Find precise map location of 4.241.201.112
120.114.78.75	Find precise map location of 120.114.78.75
60.51.12.107	Find precise map location of 60.51.12.107

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