ASN to IP Mapping

Mathieu Poussin mathieu.poussin at
Sat Mar 7 20:48:35 UTC 2015

Hi Andrew.

Check this script I made sometime ago, it gets the information you
want, I was using it to reroute all the networks of specifics AS
trough a VPN :

To make it simpler, use the command "whois -h -i origin
12345", make sure you use the RIPE whois client.

Best regards,

On 7 March 2015 at 16:37, Andrew Iwamoto
<aiwamoto at> wrote:
> Is there a tool or method to determine IP blocks assigned to an organization by ASN?  I.e. if I have an organization's ASN number I want to know all blocks assigned to that ASN.
> Thank you.
> Andrew Iwamoto
> Unleashed Technologies

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