81.43.37 is a class C of IPs

Sample IPs from the class C 81.43.37

81.43.37.1	View precise location of 81.43.37.1 on the map!
81.43.37.131	View precise location of 81.43.37.131 on the map!
81.43.37.135	View precise location of 81.43.37.135 on the map!
81.43.37.162	View precise location of 81.43.37.162 on the map!
81.43.37.204	View precise location of 81.43.37.204 on the map!
81.43.37.144	View precise location of 81.43.37.144 on the map!
81.43.37.28	View precise location of 81.43.37.28 on the map!
81.43.37.214	View precise location of 81.43.37.214 on the map!
81.43.37.103	View precise location of 81.43.37.103 on the map!
81.43.37.73	View precise location of 81.43.37.73 on the map!
81.43.37.165	View precise location of 81.43.37.165 on the map!

10 Random IPs

203.131.45.74	Find precise map location of 203.131.45.74
248.172.99.73	Find precise map location of 248.172.99.73
220.128.138.206	Find precise map location of 220.128.138.206
84.225.89.47	Find precise map location of 84.225.89.47
30.222.201.36	Find precise map location of 30.222.201.36
33.53.128.250	Find precise map location of 33.53.128.250
138.50.197.210	Find precise map location of 138.50.197.210
201.14.53.234	Find precise map location of 201.14.53.234
174.56.161.197	Find precise map location of 174.56.161.197
34.38.247.102	Find precise map location of 34.38.247.102
71.69.186.178	Find precise map location of 71.69.186.178

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