Network address
81.0.0.0
Prefix length
9
Range
81.0.0.0 - 81.127.255.255
Hexadecimal
51000000
Binary
01010001 00000000 00000000 00000000
Binary subnet mask
11111111 10000000 00000000 00000000
Number of hosts
8,388,608
Parent subnet
81.0.0.0/8🔍
Previous subnet
80.128.0.0/9🔍
Next subnet
81.128.0.0/9🔍