DHCP range planner

Find a usable pool while keeping gateways and reservations out of the range.

Address planningSubnet VLSM CIDR IPv6 DHCP

Conversion & routingBinary Wildcard Routes

PerformanceMTU TCP Transfer

Reference & configDNS Ports

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Pool requirements

Subnet / prefix

Gateway (optional)

Reserved addresses

Separate individual addresses with commas or new lines.

Pool mode

Desired pool size

DHCP allocation

Network: 192.168.1.0/24
Subnet mask: 255.255.255.0
Broadcast (excluded): 192.168.1.255
First usable: 192.168.1.1
Last usable: 192.168.1.254
Pool start: 192.168.1.4
Pool end: 192.168.1.103
Pool capacity: 100
Available before pool allocation: 251
Gateway / reservations: 192.168.1.1 192.168.1.2 192.168.1.3

Suggested pools use the first contiguous range that fits. Network, broadcast, gateway, and reserved addresses are excluded.