This script will give you an IP address and name for yahoo.com. Note: yahoo.com resolves to two IP addresses; hence, the script chooses one for you.

Requires:
nmap
webscan.pl
Nmap::Scanner
Net::Nslookup

#!/usr/bin/perl

package WebScanner;

use Net::Nslookup;
use Nmap::Scanner::Util::BannerScanner;
use vars qw(@ISA);

@ISA = qw(Nmap::Scanner::Util::BannerScanner);

my $name = Net::Nslookup->nslookup;
$name = nslookup( domain => 'yahoo.com' );
print $name, "\n";

sub new {

    my $class = shift;
    my $self  = $class->SUPER::new();

    $self->regex('Server:\s*(.+)$');
    $self->send_on_connect("HEAD / HTTP/1.0\r\n\r\n");
    $self->add_scan_port(80);
    $self->add_scan_port(8080);
    $self->add_target( $_[0]  || die "Need target in constructor!\n" )
+;
    
    return bless $self, $class;

}

1;

use lib 'lib';
use strict;

my $web =
  WebScanner->new( $name || die "Missing host to scan!\n$0 host\n" );

$web->register_banner_found_event( sub { shift; print $_[0]->hostname(
+), "\n"; }
);

$web->scan();
[download]

update: OK...to get just the name

#!/usr/bin/perl

use Net::Nslookup;

my $name = Net::Nslookup->nslookup;
$name = nslookup( domain => '66.94.234.13', type => 'PTR' );

print $name, "\n";
[download]

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