Thx for the help. I ajusted the script a little and now I atleast have some output.

use Net::Whois::RIPE;

$server = "whois.ripe.net";
$as = "LEASEWEB";

$whois = Net::Whois::RIPE->new($server);

$query = $whois->query($as);

$output = $query->content;

@lijn = split(/\n/,$output);
foreach $line (@lijn) {
    @lines = split(/:/, $line);
    next unless ($lines[0] =~ /inetnum/);
    $lines[1] =~ s/^\s+|\s+$//g;
    print $lines[1]."\n";
}

exit;
[download]

It all works fine now. But there's just one more problem. I don't get all the ranges from that AS. When I type in the AS in www.ripe.net, I get way more. I'll look further. edit1:I adjusted the code a little bit more. edit2:I'll try to explain the problem that I have now with examples. This is the output from my script:

% This is the RIPE Whois query server #1.
% The objects are in RPSL format.
%
% Rights restricted by copyright.
% See http://www.ripe.net/db/copyright.html

% Note: This output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '62.212.64.0 - 62.212.64.255'

inetnum:        62.212.64.0 - 62.212.64.255
netname:        LEASEWEB
descr:          LeaseWeb
descr:          P.O. Box 93054
descr:          1090BB AMSTERDAM
descr:          Netherlands
descr:          www.leaseweb.com
remarks:        Please send email to "abuse@leaseweb.com" for complain
+ts
remarks:        regarding portscans, DoS attacks and spam.
country:        NL
admin-c:        LSW1-RIPE
tech-c:         LSW1-RIPE
status:         ASSIGNED PA
mnt-by:         OCOM-MNT
source:         RIPE # Filtered
[download]

And this is what I get when I enter thesame AS in www.ripe.net:

% This is the RIPE Whois query server #1.
% The objects are in RPSL format.
%
% Rights restricted by copyright.
% See http://www.ripe.net/db/copyright.html

% Note: This output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '62.212.64.0 - 62.212.64.255'

inetnum:         62.212.64.0 - 62.212.64.255
netname:         LEASEWEB
descr:           LeaseWeb
descr:           P.O. Box 93054
descr:           1090BB AMSTERDAM
descr:           Netherlands
descr:           www.leaseweb.com
remarks:         Please send email to "abuse@leaseweb.com" for complai
+nts
remarks:         regarding portscans, DoS attacks and spam.
country:         NL
admin-c:         LSW1-RIPE
tech-c:          LSW1-RIPE
status:          ASSIGNED PA "status:" definitions
mnt-by:          OCOM-MNT
source:          RIPE # Filtered

person:          RIP Mean
address:         P.O. Box 93054
address:         1090BB AMSTERDAM
address:         Netherlands
phone:           +31 20 3162880
fax-no:          +31 20 3162890
abuse-mailbox:   abuse@leaseweb.com
nic-hdl:         LSW1-RIPE
mnt-by:          OCOM-MNT
source:          RIPE # Filtered

% Information related to '62.212.78.0 - 62.212.78.255'

inetnum:         62.212.78.0 - 62.212.78.255
netname:         LEASEWEB
descr:           LeaseWeb
descr:           P.O. Box 93054
descr:           1090BB AMSTERDAM
descr:           Netherlands
descr:           www.leaseweb.com
remarks:         Please send email to "abuse@leaseweb.com" for complai
+nts
remarks:         regarding portscans, DoS attacks and spam.
country:         NL
admin-c:         LSW1-RIPE
tech-c:          LSW1-RIPE
status:          ASSIGNED PA "status:" definitions
mnt-by:          OCOM-MNT
source:          RIPE # Filtered

person:          RIP Mean
address:         P.O. Box 93054
address:         1090BB AMSTERDAM
address:         Netherlands
phone:           +31 20 3162880
fax-no:          +31 20 3162890
abuse-mailbox:   abuse@leaseweb.com
nic-hdl:         LSW1-RIPE
mnt-by:          OCOM-MNT
source:          RIPE # Filtered

% Information related to '62.212.68.0 - 62.212.68.255'

inetnum:         62.212.68.0 - 62.212.68.255
netname:         LEASEWEB
descr:           LeaseWeb
descr:           P.O. Box 93054
descr:           1090BB AMSTERDAM
descr:           Netherlands
descr:           www.leaseweb.com
remarks:         Please send email to "abuse@leaseweb.com" for complai
+nts
remarks:         regarding portscans, DoS attacks and spam.
country:         NL
admin-c:         LSW1-RIPE
tech-c:          LSW1-RIPE
status:          ASSIGNED PA "status:" definitions
mnt-by:          OCOM-MNT
source:          RIPE # Filtered

person:          RIP Mean
address:         P.O. Box 93054
address:         1090BB AMSTERDAM
address:         Netherlands
phone:           +31 20 3162880
fax-no:          +31 20 3162890
abuse-mailbox:   abuse@leaseweb.com
nic-hdl:         LSW1-RIPE
mnt-by:          OCOM-MNT
source:          RIPE # Filtered
...
[download]

So with my script I only get the first object. I need my script to get more objects, like on www.ripe.net