Why "name" the fields. They are indexed numerically, so use the indexes to index your report array.

The following is a dump of @report. It shows that (from the 3 line sample supplied) field[0] contains 2x'483' and 1x'769'; field[1] contained 1 each of 3 values:'DS', 'OS', 'XO'; and so on.

C:\test\primes>..\junk83
[
  { 483 => 2, 769 => 1 },
  { DS => 1, OS => 1, XO => 1 },
  { "dx-14" => 1, "dx-32" => 2 },
  { 1 => 2, 5 => 1 },
  { charles => 1, james => 1, sully => 1 },
  { list3 => 1, list4 => 1, nolist => 1 },
  { "23.456.12.7" => 1, "aardvark.com" => 1, "widgets.com" => 1 },
  { "ty-off" => 1, "ty-on" => 2 },
  { "lx-on" => 3 },
  { B => 1, C => 1, V => 1 },
  { "01" => 2, "07" => 1 },
]
[download]

Code to produce the above output:

#! perl -slw
use strict;
use Data::Dump qw[ pp ];

my @report;

while( <DATA> ) {
    my @f = split ' ', $_;
    for my $field ( 0 .. $#f ) {
        $report[ $field ]{ $f[ $field ] }++;    
    }
}

pp \@report;

__DATA__
483 OS dx-32 1 charles list4 aardvark.com ty-off lx-on C 01
483 DS dx-14 1 james list3 23.456.12.7 ty-on lx-on B 01
769 XO dx-32 5 sully nolist widgets.com ty-on lx-on V 07
[download]