Yesterday we completed an upgrade of our recursive DNS clusters (what you see as ns1.sonic.net and ns2.sonic.net).
This upgrade gives those DNS servers a substantial performance boost and enables them to handle the ever increasing ammout of requests that they see.
DNS is core to the Internet experience — without it : E-mail ceases to function, and surfing your favorite web-sites is impossible; it is because of this that we have always made DNS a priority in our infrastructure and are very proud of our ability to stay available even during times of high traffic and maintenance.
— Augie and Don.