Leo Bicknell wrote:
In a message written on Thu, Dec 10, 2009 at 01:35:16PM -0500, Jared Mauch wrote:
As always, good research by renesys.
http://www.renesys.com/blog/2009/12/bonjour-yall-asn-split-persona.shtml [...] I would be very interested to know if something similar happened with AS3745.
AS3745 is not a duplicate ASN assignment either. Like AS35868 the entry at whois.ripe.net is a user created object in the RIPE routing registry, not an assignment by RIPE NCC. The record in the ARIN database states: OrgName: Perot Systems OrgID: PEROTS-16 Address: 3800 Hamlin Road City: Auburn Hills StateProv: MI PostalCode: 48326 Country: US ASNumber: 3745 ASName: VWAG-AS ASHandle: AS3745 Comment: RegDate: 1994-08-01 Updated: 2001-03-29 RTechHandle: AP105-ARIN RTechName: Accounts Payable, Mr. E. Zeltzer RTechPhone: +1-248-754-5803 RTechEmail: domainmaster@vw.com Both the ASName and RTechEmail already point to Volkswagen (VW). Querying whois.arin.net for AP105-ARIN shows the full contact info: Name: Accounts Payable, Mr. E. Zeltzer Handle: AP105-ARIN Company: Volkswagen of America Address: Volkswagen of America Address: 3800 Hamlin Road City: Auburn Hills StateProv: MI PostalCode: 48326 Country: US Comment: RegDate: 1998-11-25 Updated: 2001-03-29 Phone: +1-248-754-5803 (Office) Email: domainmaster@vw.com So Perot Systems seems to have received this AS in 1994 for Volkswagen America. REX, RIPE NCC's prototype Resource EXplainer, shows AS3745 has been advertising 193.23.96.0/24 and 193.23.104.0/24 (both assigned to Volkswagen AG, Germany) as long as we have routing history from RIS. In 2001 and later years parts of 194.114/17 followed. See http://albatross.ripe.net/cgi-bin/rex.pl?res=AS3745&stime=2000-01-01&etime=2009-12-09&type=all The RIPE DB lists AS3745 as "Volkswagen AG, Wolfsburg, Germany". Although not consistent with the registration info in ARIN, you can at least see how, in the 1990s, the German parent company started to use the assignment made to its American subsidiary. The odd one in the current set of prefixes advertised by AS3745 appears to be 148.9.64.0/18 If you click on this prefix in the REX listing for AS3745 you see this announcement is in the routing tables since June 2008. The encompassing 148.9/16 was originated by AS5089 from January 2003 to January 2004 and by AS1294 for some short periods in 2000 and 2001. A next click on the "Resource Holder" (near the top of the page) shows the matching record in the ARIN database to be 148.9.0.0 - 148.9.255.255 a direct assignment to Perot Systems, Plano, TX Finally, a click on the "DNS and Reverse DNS" in REX removes any doubt the /18 is somehow related to Volkswagen: for November 2009 we found one reverse DNS entry in the CAIDA IPv4 DNS-names dataset[*] pointing to a domain under .gov In summary, AS3745 is indeed used by two different organizations, but it's the users not the RIRs who created this situation. -- Rene [*] http://www.caida.org/data/active/ipv4_dnsnames_dataset.xml