Posted: Thursday, 26 May 2016
Starting at 2:45 AM EDT on Thursday, 26 May, a DDoS attack began against ARIN. This was and continues to be a sustained attack against our provisioning services, email, and website. We initiated our DDoS mitigation plan and are in the process of mitigating various types of attack traffic patterns. All our other public-facing services (Whois, Whois-RWS, RDAP, DNS, IRR, and RPKI repository services) are not affected by this attack and are operating normally.
We will announce an all clear 24 hours after the attacks have stopped.
Chief Technology Officer
American Registry for Internet Numbers (ARIN)