81.139.203 is a class C of IPs

Sample IPs from the class C 81.139.203

81.139.203.159	View precise location of 81.139.203.159 on the map!
81.139.203.197	View precise location of 81.139.203.197 on the map!
81.139.203.166	View precise location of 81.139.203.166 on the map!
81.139.203.41	View precise location of 81.139.203.41 on the map!
81.139.203.165	View precise location of 81.139.203.165 on the map!
81.139.203.194	View precise location of 81.139.203.194 on the map!
81.139.203.59	View precise location of 81.139.203.59 on the map!
81.139.203.146	View precise location of 81.139.203.146 on the map!
81.139.203.71	View precise location of 81.139.203.71 on the map!
81.139.203.113	View precise location of 81.139.203.113 on the map!
81.139.203.72	View precise location of 81.139.203.72 on the map!

10 Random IPs

246.48.148.119	Find precise map location of 246.48.148.119
87.11.201.138	Find precise map location of 87.11.201.138
144.233.201.182	Find precise map location of 144.233.201.182
230.87.193.16	Find precise map location of 230.87.193.16
81.47.249.27	Find precise map location of 81.47.249.27
128.11.205.25	Find precise map location of 128.11.205.25
128.26.132.179	Find precise map location of 128.26.132.179
59.54.82.126	Find precise map location of 59.54.82.126
255.112.98.190	Find precise map location of 255.112.98.190
178.222.118.43	Find precise map location of 178.222.118.43
44.169.3.17	Find precise map location of 44.169.3.17

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