54.21.6 is a class C of IPs

Sample IPs from the class C 54.21.6

54.21.6.170	View precise location of 54.21.6.170 on the map!
54.21.6.200	View precise location of 54.21.6.200 on the map!
54.21.6.223	View precise location of 54.21.6.223 on the map!
54.21.6.93	View precise location of 54.21.6.93 on the map!
54.21.6.162	View precise location of 54.21.6.162 on the map!
54.21.6.134	View precise location of 54.21.6.134 on the map!
54.21.6.26	View precise location of 54.21.6.26 on the map!
54.21.6.65	View precise location of 54.21.6.65 on the map!
54.21.6.107	View precise location of 54.21.6.107 on the map!
54.21.6.170	View precise location of 54.21.6.170 on the map!
54.21.6.177	View precise location of 54.21.6.177 on the map!

10 Random IPs

227.60.17.59	Find precise map location of 227.60.17.59
138.130.76.164	Find precise map location of 138.130.76.164
177.29.19.208	Find precise map location of 177.29.19.208
239.42.2.71	Find precise map location of 239.42.2.71
78.217.63.111	Find precise map location of 78.217.63.111
7.64.69.70	Find precise map location of 7.64.69.70
10.120.141.45	Find precise map location of 10.120.141.45
57.15.20.160	Find precise map location of 57.15.20.160
217.48.234.23	Find precise map location of 217.48.234.23
226.64.38.231	Find precise map location of 226.64.38.231
132.52.83.27	Find precise map location of 132.52.83.27

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