Using Win32::OLE and ADSI you can get this information:

# This Perl code displays the domain controllers for the specified dom
+ain.

# ---------------------------------------------------------------
# Adapted from VBScript code contained in the book:
#      "Active Directory Cookbook" by Robbie Allen
# Publisher: O'Reilly and Associates
# ISBN: 0-596-00466-4
# Book web site: http://rallenhome.com/books/adcookbook/code.html
# ---------------------------------------------------------------

# ------ SCRIPT CONFIGURATION ------
my $strDomain = '';  # e.g. emea.rallencorp.com
# ------ END CONFIGURATION ---------
use Win32::OLE 'in';
$Win32::OLE::Warn = 3;
my $objRootDSE = Win32::OLE->GetObject("LDAP://$strDomain/RootDSE");
my $objDomain = Win32::OLE->GetObject("LDAP://" . $objRootDSE->Get("de
+faultNamingContext"));
my $strMasteredBy = $objDomain->GetEx("masteredBy");
foreach my $strNTDSDN (in $strMasteredBy) {
   my $objNTDS = Win32::OLE->GetObject("LDAP://" . $strNTDSDN);
   my $objServer = Win32::OLE->GetObject($objNTDS->Parent);
   print $objServer->Get("dNSHostName"),"\n";
}
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Adapt to taste.