IPv4 Addressing Architecture: Classes, Masks, and Reserved Ranges
Class A Networks
The leading bit of a Class A address is always 0. This allocation leaves 7 bits for the network portion and 24 bits for the host portion.
First Octet Range: 1 to 126 (00000001 to 01111111)
Default Subnet Mask: 255.0.0.0 (/8)
Host Capacity: 2^24 - 2 = 16,777,214 usable hosts per network (subtracting the network identifier and t ...
Posted on Mon, 11 May 2026 00:02:24 +0000 by marty_arl