81.143.38 is a class C of IPs

Sample IPs from the class C 81.143.38

81.143.38.125	View precise location of 81.143.38.125 on the map!
81.143.38.226	View precise location of 81.143.38.226 on the map!
81.143.38.76	View precise location of 81.143.38.76 on the map!
81.143.38.243	View precise location of 81.143.38.243 on the map!
81.143.38.229	View precise location of 81.143.38.229 on the map!
81.143.38.219	View precise location of 81.143.38.219 on the map!
81.143.38.251	View precise location of 81.143.38.251 on the map!
81.143.38.111	View precise location of 81.143.38.111 on the map!
81.143.38.243	View precise location of 81.143.38.243 on the map!
81.143.38.17	View precise location of 81.143.38.17 on the map!
81.143.38.81	View precise location of 81.143.38.81 on the map!

10 Random IPs

53.82.91.23	Find precise map location of 53.82.91.23
132.125.221.1	Find precise map location of 132.125.221.1
67.116.1.127	Find precise map location of 67.116.1.127
96.250.102.175	Find precise map location of 96.250.102.175
215.150.232.50	Find precise map location of 215.150.232.50
68.233.139.117	Find precise map location of 68.233.139.117
124.177.38.234	Find precise map location of 124.177.38.234
152.164.202.77	Find precise map location of 152.164.202.77
102.117.43.171	Find precise map location of 102.117.43.171
34.49.112.179	Find precise map location of 34.49.112.179
232.26.126.242	Find precise map location of 232.26.126.242

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