81.63.20 is a class C of IPs

Sample IPs from the class C 81.63.20

81.63.20.187	View precise location of 81.63.20.187 on the map!
81.63.20.111	View precise location of 81.63.20.111 on the map!
81.63.20.34	View precise location of 81.63.20.34 on the map!
81.63.20.123	View precise location of 81.63.20.123 on the map!
81.63.20.76	View precise location of 81.63.20.76 on the map!
81.63.20.54	View precise location of 81.63.20.54 on the map!
81.63.20.164	View precise location of 81.63.20.164 on the map!
81.63.20.196	View precise location of 81.63.20.196 on the map!
81.63.20.218	View precise location of 81.63.20.218 on the map!
81.63.20.67	View precise location of 81.63.20.67 on the map!
81.63.20.54	View precise location of 81.63.20.54 on the map!

10 Random IPs

46.160.51.254	Find precise map location of 46.160.51.254
147.126.208.48	Find precise map location of 147.126.208.48
223.147.64.53	Find precise map location of 223.147.64.53
137.54.112.205	Find precise map location of 137.54.112.205
71.240.167.237	Find precise map location of 71.240.167.237
19.239.45.23	Find precise map location of 19.239.45.23
229.69.101.193	Find precise map location of 229.69.101.193
141.96.239.153	Find precise map location of 141.96.239.153
50.226.14.128	Find precise map location of 50.226.14.128
162.32.127.191	Find precise map location of 162.32.127.191
88.186.9.36	Find precise map location of 88.186.9.36

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