81.138.5 is a class C of IPs

Sample IPs from the class C 81.138.5

81.138.5.127	View precise location of 81.138.5.127 on the map!
81.138.5.147	View precise location of 81.138.5.147 on the map!
81.138.5.54	View precise location of 81.138.5.54 on the map!
81.138.5.167	View precise location of 81.138.5.167 on the map!
81.138.5.235	View precise location of 81.138.5.235 on the map!
81.138.5.38	View precise location of 81.138.5.38 on the map!
81.138.5.9	View precise location of 81.138.5.9 on the map!
81.138.5.253	View precise location of 81.138.5.253 on the map!
81.138.5.94	View precise location of 81.138.5.94 on the map!
81.138.5.141	View precise location of 81.138.5.141 on the map!
81.138.5.72	View precise location of 81.138.5.72 on the map!

10 Random IPs

199.247.158.219	Find precise map location of 199.247.158.219
24.239.62.12	Find precise map location of 24.239.62.12
133.191.215.7	Find precise map location of 133.191.215.7
132.12.42.233	Find precise map location of 132.12.42.233
28.58.46.220	Find precise map location of 28.58.46.220
233.116.85.3	Find precise map location of 233.116.85.3
80.226.202.137	Find precise map location of 80.226.202.137
174.171.174.7	Find precise map location of 174.171.174.7
54.39.51.27	Find precise map location of 54.39.51.27
4.242.201.95	Find precise map location of 4.242.201.95
93.56.249.255	Find precise map location of 93.56.249.255

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