10/21/16, 3:53PM: Please see the updated post Zuora Service Update
Today DNS provider Dyn is undergoing a major DDoS attack which is disrupting internet traffic across the USA. Customers are reporting issues reaching Zuora which is related to this issue. We are actively working with their support team to mitigate the issue as soon as possible.
We apologize for the inconvenience and thank you for your patience.
Zuora Status: https://zuora.statuspage.io/