81.197.159 is a class C of IPs

Sample IPs from the class C 81.197.159

81.197.159.22	View precise location of 81.197.159.22 on the map!
81.197.159.181	View precise location of 81.197.159.181 on the map!
81.197.159.167	View precise location of 81.197.159.167 on the map!
81.197.159.98	View precise location of 81.197.159.98 on the map!
81.197.159.108	View precise location of 81.197.159.108 on the map!
81.197.159.55	View precise location of 81.197.159.55 on the map!
81.197.159.5	View precise location of 81.197.159.5 on the map!
81.197.159.191	View precise location of 81.197.159.191 on the map!
81.197.159.60	View precise location of 81.197.159.60 on the map!
81.197.159.211	View precise location of 81.197.159.211 on the map!
81.197.159.127	View precise location of 81.197.159.127 on the map!

10 Random IPs

108.205.182.23	Find precise map location of 108.205.182.23
244.214.108.54	Find precise map location of 244.214.108.54
184.172.69.33	Find precise map location of 184.172.69.33
249.250.87.178	Find precise map location of 249.250.87.178
205.126.91.122	Find precise map location of 205.126.91.122
191.236.235.161	Find precise map location of 191.236.235.161
16.46.207.28	Find precise map location of 16.46.207.28
253.59.204.132	Find precise map location of 253.59.204.132
69.136.250.66	Find precise map location of 69.136.250.66
200.255.161.197	Find precise map location of 200.255.161.197
249.123.236.27	Find precise map location of 249.123.236.27

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