72.138.81 is a class C of IPs

Sample IPs from the class C 72.138.81

72.138.81.3	View precise location of 72.138.81.3 on the map!
72.138.81.215	View precise location of 72.138.81.215 on the map!
72.138.81.6	View precise location of 72.138.81.6 on the map!
72.138.81.3	View precise location of 72.138.81.3 on the map!
72.138.81.182	View precise location of 72.138.81.182 on the map!
72.138.81.71	View precise location of 72.138.81.71 on the map!
72.138.81.167	View precise location of 72.138.81.167 on the map!
72.138.81.243	View precise location of 72.138.81.243 on the map!
72.138.81.144	View precise location of 72.138.81.144 on the map!
72.138.81.5	View precise location of 72.138.81.5 on the map!
72.138.81.8	View precise location of 72.138.81.8 on the map!

10 Random IPs

29.25.43.168	Find precise map location of 29.25.43.168
195.65.80.79	Find precise map location of 195.65.80.79
25.117.23.111	Find precise map location of 25.117.23.111
119.14.191.31	Find precise map location of 119.14.191.31
251.45.172.140	Find precise map location of 251.45.172.140
220.89.237.239	Find precise map location of 220.89.237.239
206.57.104.180	Find precise map location of 206.57.104.180
94.60.160.166	Find precise map location of 94.60.160.166
115.26.47.90	Find precise map location of 115.26.47.90
232.230.162.79	Find precise map location of 232.230.162.79
80.234.247.38	Find precise map location of 80.234.247.38

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