81.147.133 is a class C of IPs

Sample IPs from the class C 81.147.133

81.147.133.126	View precise location of 81.147.133.126 on the map!
81.147.133.215	View precise location of 81.147.133.215 on the map!
81.147.133.172	View precise location of 81.147.133.172 on the map!
81.147.133.241	View precise location of 81.147.133.241 on the map!
81.147.133.187	View precise location of 81.147.133.187 on the map!
81.147.133.7	View precise location of 81.147.133.7 on the map!
81.147.133.154	View precise location of 81.147.133.154 on the map!
81.147.133.68	View precise location of 81.147.133.68 on the map!
81.147.133.117	View precise location of 81.147.133.117 on the map!
81.147.133.160	View precise location of 81.147.133.160 on the map!
81.147.133.100	View precise location of 81.147.133.100 on the map!

10 Random IPs

5.232.157.220	Find precise map location of 5.232.157.220
242.180.48.178	Find precise map location of 242.180.48.178
240.204.65.220	Find precise map location of 240.204.65.220
144.9.171.250	Find precise map location of 144.9.171.250
144.215.63.4	Find precise map location of 144.215.63.4
39.79.224.39	Find precise map location of 39.79.224.39
89.165.244.82	Find precise map location of 89.165.244.82
26.47.49.55	Find precise map location of 26.47.49.55
87.167.158.80	Find precise map location of 87.167.158.80
33.75.182.23	Find precise map location of 33.75.182.23
40.108.102.166	Find precise map location of 40.108.102.166

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