How can I do this on DHCP server ?

[Supote Leelasupphakorn]

Hi list,

   I've set up a DHCP server but I'd like to know
which address (from address pool) hasn't assigned
to any machine. Is there command line to accomplish
this.

PS. I use ISC-DHCP v.3 installed from ports.

TIA,
Pote

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