81.99.236 is a class C of IPs

Sample IPs from the class C 81.99.236

81.99.236.145	View precise location of 81.99.236.145 on the map!
81.99.236.161	View precise location of 81.99.236.161 on the map!
81.99.236.65	View precise location of 81.99.236.65 on the map!
81.99.236.146	View precise location of 81.99.236.146 on the map!
81.99.236.92	View precise location of 81.99.236.92 on the map!
81.99.236.109	View precise location of 81.99.236.109 on the map!
81.99.236.230	View precise location of 81.99.236.230 on the map!
81.99.236.232	View precise location of 81.99.236.232 on the map!
81.99.236.237	View precise location of 81.99.236.237 on the map!
81.99.236.53	View precise location of 81.99.236.53 on the map!
81.99.236.1	View precise location of 81.99.236.1 on the map!

10 Random IPs

61.104.16.115	Find precise map location of 61.104.16.115
222.101.26.52	Find precise map location of 222.101.26.52
120.102.35.237	Find precise map location of 120.102.35.237
216.179.133.187	Find precise map location of 216.179.133.187
196.71.94.72	Find precise map location of 196.71.94.72
254.56.188.58	Find precise map location of 254.56.188.58
232.15.88.106	Find precise map location of 232.15.88.106
157.245.42.131	Find precise map location of 157.245.42.131
172.30.122.68	Find precise map location of 172.30.122.68
132.20.53.68	Find precise map location of 132.20.53.68
101.85.66.173	Find precise map location of 101.85.66.173

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