Network address
21.128.0.0
Prefix length
9 (255.128.0.0)
Range
21.128.0.0 - 21.255.255.255
Hexadecimal
15800000
Binary
00010101 10000000 00000000 00000000
Binary subnet mask
11111111 10000000 00000000 00000000
Number of hosts
8,388,608
Parent subnet
21.0.0.0/8🔍
Previous subnet
21.0.0.0/9🔍