81.183.240 is a class C of IPs

Sample IPs from the class C 81.183.240

81.183.240.76	View precise location of 81.183.240.76 on the map!
81.183.240.122	View precise location of 81.183.240.122 on the map!
81.183.240.251	View precise location of 81.183.240.251 on the map!
81.183.240.206	View precise location of 81.183.240.206 on the map!
81.183.240.218	View precise location of 81.183.240.218 on the map!
81.183.240.105	View precise location of 81.183.240.105 on the map!
81.183.240.4	View precise location of 81.183.240.4 on the map!
81.183.240.105	View precise location of 81.183.240.105 on the map!
81.183.240.80	View precise location of 81.183.240.80 on the map!
81.183.240.21	View precise location of 81.183.240.21 on the map!
81.183.240.82	View precise location of 81.183.240.82 on the map!

10 Random IPs

90.114.227.134	Find precise map location of 90.114.227.134
157.48.4.135	Find precise map location of 157.48.4.135
5.66.71.255	Find precise map location of 5.66.71.255
99.32.166.21	Find precise map location of 99.32.166.21
48.153.220.12	Find precise map location of 48.153.220.12
75.81.144.137	Find precise map location of 75.81.144.137
11.32.3.31	Find precise map location of 11.32.3.31
175.72.41.2	Find precise map location of 175.72.41.2
108.228.78.251	Find precise map location of 108.228.78.251
206.203.241.4	Find precise map location of 206.203.241.4
28.143.13.70	Find precise map location of 28.143.13.70

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