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Exclude ranges

Addresses the allocator must never offer. Gateways, VIPs, printers you assigned by hand years ago.

On /subnets/{id}, panel Excludes. Admin only.

  1. Start IP (required).
  2. End IP (blank = same as start).
  3. Add exclude.

The range must sit in the subnet CIDR. A reservation may not land in an exclude (API returns 422).

Excludes shrink free on purpose. They are not counted as managed IPs.

Typical lab: exclude the gateway you set on the subnet. Typical production: exclude the network/broadcast, router, and any anycast VIP that lives in the same CIDR.

To give that address to a known DHCP client, use a reservation, not an exclude. Header search for an IP will show exclude if it sits in one of these ranges.