231.16.213 is a class C of IPs

Sample IPs from the class C 231.16.213

231.16.213.231	View precise location of 231.16.213.231 on the map!
231.16.213.28	View precise location of 231.16.213.28 on the map!
231.16.213.209	View precise location of 231.16.213.209 on the map!
231.16.213.80	View precise location of 231.16.213.80 on the map!
231.16.213.35	View precise location of 231.16.213.35 on the map!
231.16.213.107	View precise location of 231.16.213.107 on the map!
231.16.213.98	View precise location of 231.16.213.98 on the map!
231.16.213.20	View precise location of 231.16.213.20 on the map!
231.16.213.39	View precise location of 231.16.213.39 on the map!
231.16.213.80	View precise location of 231.16.213.80 on the map!
231.16.213.255	View precise location of 231.16.213.255 on the map!

10 Random IPs

123.149.97.46	Find precise map location of 123.149.97.46
247.72.205.143	Find precise map location of 247.72.205.143
77.2.55.176	Find precise map location of 77.2.55.176
56.225.54.182	Find precise map location of 56.225.54.182
216.117.235.246	Find precise map location of 216.117.235.246
153.66.183.120	Find precise map location of 153.66.183.120
15.104.255.52	Find precise map location of 15.104.255.52
248.90.162.25	Find precise map location of 248.90.162.25
239.67.162.135	Find precise map location of 239.67.162.135
78.118.58.140	Find precise map location of 78.118.58.140
53.65.185.252	Find precise map location of 53.65.185.252

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