81.83.56 is a class C of IPs

Sample IPs from the class C 81.83.56

81.83.56.111	View precise location of 81.83.56.111 on the map!
81.83.56.59	View precise location of 81.83.56.59 on the map!
81.83.56.30	View precise location of 81.83.56.30 on the map!
81.83.56.92	View precise location of 81.83.56.92 on the map!
81.83.56.86	View precise location of 81.83.56.86 on the map!
81.83.56.215	View precise location of 81.83.56.215 on the map!
81.83.56.241	View precise location of 81.83.56.241 on the map!
81.83.56.248	View precise location of 81.83.56.248 on the map!
81.83.56.13	View precise location of 81.83.56.13 on the map!
81.83.56.33	View precise location of 81.83.56.33 on the map!
81.83.56.152	View precise location of 81.83.56.152 on the map!

10 Random IPs

241.4.1.60	Find precise map location of 241.4.1.60
183.180.57.38	Find precise map location of 183.180.57.38
111.173.191.125	Find precise map location of 111.173.191.125
246.234.163.76	Find precise map location of 246.234.163.76
206.201.252.144	Find precise map location of 206.201.252.144
137.63.29.152	Find precise map location of 137.63.29.152
151.90.174.164	Find precise map location of 151.90.174.164
21.113.84.72	Find precise map location of 21.113.84.72
195.24.247.151	Find precise map location of 195.24.247.151
87.166.93.29	Find precise map location of 87.166.93.29
191.175.224.141	Find precise map location of 191.175.224.141

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