81.145.152 is a class C of IPs

Sample IPs from the class C 81.145.152

81.145.152.100	View precise location of 81.145.152.100 on the map!
81.145.152.199	View precise location of 81.145.152.199 on the map!
81.145.152.182	View precise location of 81.145.152.182 on the map!
81.145.152.69	View precise location of 81.145.152.69 on the map!
81.145.152.114	View precise location of 81.145.152.114 on the map!
81.145.152.243	View precise location of 81.145.152.243 on the map!
81.145.152.143	View precise location of 81.145.152.143 on the map!
81.145.152.7	View precise location of 81.145.152.7 on the map!
81.145.152.35	View precise location of 81.145.152.35 on the map!
81.145.152.58	View precise location of 81.145.152.58 on the map!
81.145.152.223	View precise location of 81.145.152.223 on the map!

10 Random IPs

21.3.147.226	Find precise map location of 21.3.147.226
212.165.234.222	Find precise map location of 212.165.234.222
26.236.26.91	Find precise map location of 26.236.26.91
28.91.98.229	Find precise map location of 28.91.98.229
128.165.101.133	Find precise map location of 128.165.101.133
199.206.72.114	Find precise map location of 199.206.72.114
13.205.39.63	Find precise map location of 13.205.39.63
99.103.141.89	Find precise map location of 99.103.141.89
154.126.96.166	Find precise map location of 154.126.96.166
75.228.147.227	Find precise map location of 75.228.147.227
140.180.119.204	Find precise map location of 140.180.119.204

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