81.83.11 is a class C of IPs

Sample IPs from the class C 81.83.11

81.83.11.22	View precise location of 81.83.11.22 on the map!
81.83.11.252	View precise location of 81.83.11.252 on the map!
81.83.11.127	View precise location of 81.83.11.127 on the map!
81.83.11.196	View precise location of 81.83.11.196 on the map!
81.83.11.11	View precise location of 81.83.11.11 on the map!
81.83.11.254	View precise location of 81.83.11.254 on the map!
81.83.11.20	View precise location of 81.83.11.20 on the map!
81.83.11.182	View precise location of 81.83.11.182 on the map!
81.83.11.40	View precise location of 81.83.11.40 on the map!
81.83.11.63	View precise location of 81.83.11.63 on the map!
81.83.11.28	View precise location of 81.83.11.28 on the map!

10 Random IPs

32.73.240.163	Find precise map location of 32.73.240.163
200.173.33.162	Find precise map location of 200.173.33.162
184.250.141.105	Find precise map location of 184.250.141.105
159.156.185.214	Find precise map location of 159.156.185.214
100.25.165.181	Find precise map location of 100.25.165.181
102.142.9.53	Find precise map location of 102.142.9.53
89.207.137.59	Find precise map location of 89.207.137.59
160.143.123.167	Find precise map location of 160.143.123.167
183.123.195.77	Find precise map location of 183.123.195.77
250.18.147.55	Find precise map location of 250.18.147.55
86.54.61.49	Find precise map location of 86.54.61.49

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