What is the calculation period?

On the dedicated servers in Europe, the amount of the traffic used is calculated for 1 calendar month. No matter when the server was activated, the calculation period is from the 1st to the 30th day of the month.

Is the internal traffic in the Data center calculated?

The internal traffic in Data centers residing in Europe is not calculated.

Is incoming or outgoing traffic calculated? 

The outgoing traffic is calculated.

Where can I find the server’s current traffic usage?

For dedicated servers, you can find it in the Dedicated servers section — Server’s page — Traffic.