Your account dashboard shows near real-time bandwidth usage. Look for the Current & Past Bandwidth Usage table. This will show your username, any sub accounts you have, along with your current total bandwidth usage, and past bandwidth usage from previous billing periods. If any of the bandwidth numbers is underlined, then if you hover over the bandwidth number, you see a chart showing your bandwidth usage by day for the last 30 days.
Bandwidth usage numbers are updated approximately every 5 minutes. If you have questions or concerns about your bandwidth usage, please contact support.