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 < > 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. >> > > 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 >
