#!/usr/local/bin/perl


use Net::DNS;

$domain = $ARGV[0];

#192.48.79.30 is j.gtld-servers.net

my $res = Net::DNS::Resolver->new(
        nameservers => [qw(192.48.79.30)],
        recurse     => 1,
        debug       => 1,
  );

$packet = $res->query("$domain", 'NS');

@authority = $packet->authority;


foreach $rr (@authority) {
        print $rr->string, "\n";
        }

##</code><code>##

whiskey> ./sim5.pl happy.com
;; query(happy.com, NS)
;; setting up an AF_INET() family type UDP socket
;; send_udp(192.35.51.30:53)
;; answer from 192.35.51.30:53 : 105 bytes
;; HEADER SECTION
;; id = 55673
;; qr = 1    opcode = QUERY    aa = 0    tc = 0    rd = 1
;; ra = 0    ad = 0    cd = 0    rcode  = NOERROR
;; qdcount = 1  ancount = 0  nscount = 2  arcount = 2

;; QUESTION SECTION (1 record)
;; happy.com.   IN      NS

;; ANSWER SECTION (0 records)

;; AUTHORITY SECTION (2 records)
happy.com.      172800  IN      NS      ns6.walgreens.com.
happy.com.      172800  IN      NS      ns7.walgreens.com.

;; ADDITIONAL SECTION (2 records)
ns6.walgreens.com.      172800  IN      A       204.15.116.4
ns7.walgreens.com.      172800  IN      A       204.15.116.132

Can't call method "authority" on an undefined value at ./sim5.pl line 16.