foreach my $network (keys %urls) {
    foreach my $key (keys %{$urls{$network}}) {
        print "$key<br/>";
    }
}

[download]
or 
foreach my $network (values %urls) {
    foreach my $key (keys %$network) {
        print "$key<br/>";
    }
}

[download]

In reply to Re^3: accessing a hash of hashes by Thilosophy
in thread accessing a hash of hashes by existem

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