cat /var/lib/dhcp/dhcpd.leases

# The format of this file is documented in the dhcpd.leases(5) manual page.
# This lease file was written by isc-dhcp-4.2.4

server-duid "\000\001\000\001\036\366\301\247\010\000'\"8\363";

lease 172.16.33.150 {
  starts 5 2016/06/17 14:15:48;
  ends 5 2016/06/17 14:25:48;
  cltt 5 2016/06/17 14:15:48;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 08:00:27:8e:c4:85;
  client-hostname "estacao-redes-II";
}
lease 172.16.33.150 {
  starts 5 2016/06/17 14:15:56;
  ends 5 2016/06/17 14:25:56;
  cltt 5 2016/06/17 14:15:56;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 08:00:27:8e:c4:85;
  client-hostname "estacao-redes-II";
}