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 :
https://github.com/mathieupoussin/junos_reroute_asn/blob/master/reroute_asn.pl To make it simpler, use the command "whois -h whois.radb.net -i origin 12345", make sure you use the RIPE whois client. Best regards, Mathieu On 7 March 2015 at 16:37, Andrew Iwamoto <aiwam...@unleashed-technologies.com> 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 >