Subnet Splitter

Split a parent CIDR into VLSM subnets sized for required hosts.

Processed in your browser — nothing is uploaded

Required hosts per subnet

Comma-separated, e.g. 50,20,10,5

Related tools

Calculate network, broadcast, mask, hosts and range for an IPv4 CIDR.

Summarize an IPv4 range into CIDR blocks or expand a CIDR into a range.

Convert between CIDR prefixes and IPv4 netmasks.