Do You Know How Many IPs Your CIDR Block Really Has? Understanding Network Capacity and Allocation
Many people use CIDR blocks every day without knowing exactly how many IP addresses they actually have. A CIDR block like /24 gives exactly 256 possible IP addresses, while a /29 block gives 8, and each size gives a different number you can count on for planning. Not understanding this can leave networks overcrowded or wasteful, leading to problems later.