How this tool works
Both ends must belong to the specified subnet. Traditional network and broadcast addresses are excluded for /30 or larger address pools. Device leases and static exclusions must be considered separately.
Worked example
Within 192.168.1.0/24, 192.168.1.100–192.168.1.200 includes 101 possible lease addresses.
Always verify outputs before changing production systems. These tools are for learning, planning, and troubleshooting.