23.56.21 is a class C of IPs

Sample IPs from the class C 23.56.21

23.56.21.194	View precise location of 23.56.21.194 on the map!
23.56.21.255	View precise location of 23.56.21.255 on the map!
23.56.21.36	View precise location of 23.56.21.36 on the map!
23.56.21.33	View precise location of 23.56.21.33 on the map!
23.56.21.135	View precise location of 23.56.21.135 on the map!
23.56.21.136	View precise location of 23.56.21.136 on the map!
23.56.21.43	View precise location of 23.56.21.43 on the map!
23.56.21.254	View precise location of 23.56.21.254 on the map!
23.56.21.231	View precise location of 23.56.21.231 on the map!
23.56.21.86	View precise location of 23.56.21.86 on the map!
23.56.21.58	View precise location of 23.56.21.58 on the map!

10 Random IPs

137.124.185.71	Find precise map location of 137.124.185.71
8.218.58.26	Find precise map location of 8.218.58.26
88.203.84.39	Find precise map location of 88.203.84.39
137.53.29.212	Find precise map location of 137.53.29.212
195.164.158.160	Find precise map location of 195.164.158.160
36.236.215.127	Find precise map location of 36.236.215.127
71.206.191.163	Find precise map location of 71.206.191.163
138.212.54.89	Find precise map location of 138.212.54.89
114.60.148.70	Find precise map location of 114.60.148.70
9.116.164.48	Find precise map location of 9.116.164.48
210.55.169.151	Find precise map location of 210.55.169.151

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