GoDaddy moved to quash speculation it was hacked yesterday, insisting full service has been resumed after an internal issue caused an outage affecting millions of websites.

The world’s largest domain registrar was unreachable with any domain registered with GoDaddy which uses its name servers and DNS records also suffering from the outage.

Claims by an “Anonymous” hacker group on Twitter says it is behind the hack but GoDaddy released a statement denying such actions:

Yesterday, GoDaddy.com and many of our customers experienced intermittent service outages starting shortly after 10 a.m. PDT. Service was fully restored by 4 p.m. PDT.

The service outage was not caused by external influences. It was not a "hack" and it was not a denial of service attack (DDoS). We have determined the service outage was due to a series of internal network events that corrupted router data tables. Once the issues were identified, we took corrective actions to restore services for our customers and GoDaddy.com. We have implemented measures to prevent this from occurring again.

At no time was any customer data at risk or were any of our systems compromised.

Throughout our history, we have provided 99.999% uptime in our DNS infrastructure. This is the level our customers expect from us and the level we expect of ourselves. We have let our customers down and we know it.

We take our business and our customers' businesses very seriously. We apologize to our customers for these events and thank them for their patience.

- Scott Wagner Go Daddy CEO