81.152.56 is a class C of IPs

Sample IPs from the class C 81.152.56

81.152.56.8	View precise location of 81.152.56.8 on the map!
81.152.56.64	View precise location of 81.152.56.64 on the map!
81.152.56.161	View precise location of 81.152.56.161 on the map!
81.152.56.190	View precise location of 81.152.56.190 on the map!
81.152.56.129	View precise location of 81.152.56.129 on the map!
81.152.56.30	View precise location of 81.152.56.30 on the map!
81.152.56.245	View precise location of 81.152.56.245 on the map!
81.152.56.201	View precise location of 81.152.56.201 on the map!
81.152.56.236	View precise location of 81.152.56.236 on the map!
81.152.56.1	View precise location of 81.152.56.1 on the map!
81.152.56.251	View precise location of 81.152.56.251 on the map!

10 Random IPs

203.186.240.78	Find precise map location of 203.186.240.78
109.109.241.131	Find precise map location of 109.109.241.131
2.220.213.213	Find precise map location of 2.220.213.213
152.160.138.39	Find precise map location of 152.160.138.39
182.17.166.219	Find precise map location of 182.17.166.219
10.70.34.196	Find precise map location of 10.70.34.196
226.190.154.69	Find precise map location of 226.190.154.69
146.136.6.229	Find precise map location of 146.136.6.229
94.63.16.252	Find precise map location of 94.63.16.252
75.20.49.146	Find precise map location of 75.20.49.146
192.154.17.102	Find precise map location of 192.154.17.102

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