[178798] in North American Network Operators' Group
Re: ASN to IP Mapping
daemon@ATHENA.MIT.EDU (Bob Evans)
Sat Mar 7 16:37:49 2015
X-Original-To: nanog@nanog.org
In-Reply-To: <CAGFn2k3OL=XXD=8H_r_ZRLMRed1pwJTsgukJ1F+RYSxotZxs0A@mail.gmail.com>
Date: Sat, 7 Mar 2015 13:37:47 -0800
From: "Bob Evans" <bob@FiberInternetCenter.com>
To: "Rubens Kuhl" <rubensk@gmail.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>,
Andrew Iwamoto <aiwamoto@unleashed-technologies.com>
Reply-To: bob@FiberInternetCenter.com
Errors-To: nanog-bounces@nanog.org
Step 1: Input an IP prefix for the originating ASN of a prefix
https://radar.qrator.net
Step2: Check the RIR whois (as stated below) for confirmation as to who's
assigned space.
Thank You
Bob Evans
CTO
> On Sat, Mar 7, 2015 at 12:37 PM, Andrew Iwamoto <
> aiwamoto@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.
>>
>
> That's RIR/NIR-dependent, so you probably have to go thru all of them to
> map all possible IP blocks. Other references suggested bgp.he.net that
> will
> only list advertised networks, and IRRs will only have IRR-listed
> networks.
>
> For instance, on ARIN for AS 15141:
>
> http://whois.arin.net/rest/asn/AS15141
>
> Find the organization name; click on the link
> http://whois.arin.net/rest/org/BAUSCH-1.html
>
> Find the networks link:
> http://whois.arin.net/rest/org/BAUSCH-1/nets
>
> Network ResourcesBAUSCH-LOMB (NET-161-242-0-0-1
> <http://whois.arin.net/rest/net/NET-161-242-0-0-1.html>)161.242.0.0 -
> 161.242.255.255
>
> Look for the other RIRs; rinse and repeat.
>
>
>
> Rubens
>
