%sites = {
  site1 => [ '192.168.1.0/24', '10.10.10.0/24', '4.5.6.7/255.255.255.192'],
  site2 => [ '1.2.3.4/255.255.255.240', '10.1.1.1/255.255.255.252']
  ...
  };

##</code><code>##

%sites = (
  site1 => { 
    ipinfo  =>  [ '192.168.1.0/24', '10.10.10.0/24', '4.5.6.7/255.255.255.192'],
    descr   =>  'North California',
    isp     =>  'Verizon'
    },
  site2 => {
    ipinfo  =>  [ '1.2.3.4/255.255.255.240', '10.1.1.1/255.255.255.252']
    descr   =>  'South California',
    isp     =>  'Time Warner'
    },
    ...
    );

##</code><code>##

  $sites{'site1'}{'ipinfo'} = Net::CIDR::Lite->new;

##</code><code>##

  $cidr = Net::CIDR::Lite->new;
  $sites{'site1'}{'ipinfo'} = $cidr->add_cidr('192.168.1.0/24');