I believe that this is what you are trying to do. Note the square brackets ( Making References)to create array references and the syntax @$tuple ( Using References) to dereference them.
use strict;
use warnings;
my @sites=( ["50049", "city1", "url1"],
["52556", "city2", "url2"],
["50219", "city3", "url3"] );
foreach my $tuple (@sites) {
my ( $zip, $name, $url ) = @$tuple;
...;
}
Update: Added Links, corrected typo
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