55.72.21 is a class C of IPs

Sample IPs from the class C 55.72.21

55.72.21.227	View precise location of 55.72.21.227 on the map!
55.72.21.178	View precise location of 55.72.21.178 on the map!
55.72.21.142	View precise location of 55.72.21.142 on the map!
55.72.21.202	View precise location of 55.72.21.202 on the map!
55.72.21.220	View precise location of 55.72.21.220 on the map!
55.72.21.155	View precise location of 55.72.21.155 on the map!
55.72.21.143	View precise location of 55.72.21.143 on the map!
55.72.21.27	View precise location of 55.72.21.27 on the map!
55.72.21.37	View precise location of 55.72.21.37 on the map!
55.72.21.91	View precise location of 55.72.21.91 on the map!
55.72.21.133	View precise location of 55.72.21.133 on the map!

10 Random IPs

5.90.36.121	Find precise map location of 5.90.36.121
54.181.116.221	Find precise map location of 54.181.116.221
44.59.161.240	Find precise map location of 44.59.161.240
59.92.186.240	Find precise map location of 59.92.186.240
15.217.119.88	Find precise map location of 15.217.119.88
220.32.27.16	Find precise map location of 220.32.27.16
139.5.228.99	Find precise map location of 139.5.228.99
115.201.61.135	Find precise map location of 115.201.61.135
66.92.238.186	Find precise map location of 66.92.238.186
125.166.164.230	Find precise map location of 125.166.164.230
187.15.131.79	Find precise map location of 187.15.131.79

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