Network Calculator (VLSM)

Calculate Variable Length Subnet Masks for efficient IP address allocation

vlsmsubnetnetworkcalculatoripplanningallocationcidr

Base Network

Network Address

CIDR Prefix

VLSM (Variable Length Subnet Masking)

• Allows efficient use of IP address space by allocating different subnet sizes

• Subnets are allocated largest-first for optimal efficiency

• Each subnet size is rounded up to the nearest power of 2

• Remember to account for future growth when planning subnets