use strict;
use Data::Dumper;
my @four;
my @all;
my $count = 0;
while (<DATA>) {
    s/\s+$//;
    push @four , $_;
    $count++;
    if ( ($count % 4) == 0) {
        push @all , [ @four ];
        @four = ();
    }
}

print Dumper(\@all);

__DATA__
name1
address1
phone1
fax1
name2
address2
phone2
fax2