148.156.21 is a class C of IPs

Sample IPs from the class C 148.156.21

148.156.21.139	View precise location of 148.156.21.139 on the map!
148.156.21.172	View precise location of 148.156.21.172 on the map!
148.156.21.89	View precise location of 148.156.21.89 on the map!
148.156.21.244	View precise location of 148.156.21.244 on the map!
148.156.21.247	View precise location of 148.156.21.247 on the map!
148.156.21.193	View precise location of 148.156.21.193 on the map!
148.156.21.192	View precise location of 148.156.21.192 on the map!
148.156.21.54	View precise location of 148.156.21.54 on the map!
148.156.21.142	View precise location of 148.156.21.142 on the map!
148.156.21.40	View precise location of 148.156.21.40 on the map!
148.156.21.153	View precise location of 148.156.21.153 on the map!

10 Random IPs

208.228.74.93	Find precise map location of 208.228.74.93
195.120.116.155	Find precise map location of 195.120.116.155
64.53.4.214	Find precise map location of 64.53.4.214
215.67.125.109	Find precise map location of 215.67.125.109
66.79.158.102	Find precise map location of 66.79.158.102
92.101.255.83	Find precise map location of 92.101.255.83
5.157.66.149	Find precise map location of 5.157.66.149
192.204.230.253	Find precise map location of 192.204.230.253
109.153.205.51	Find precise map location of 109.153.205.51
194.182.133.61	Find precise map location of 194.182.133.61
114.83.152.227	Find precise map location of 114.83.152.227

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