From http://www.anarchy-online.com/wsp/anarc ... le=CONTENT:
Billing and Game Server Downtime (1 October) Plus 17.6 News
On Monday, the billing system and game servers will be down for a few hours (for more details, click that More link right there).
On Monday, the billing system will be down starting at 9am Oslo time (for what that means in your local time zone, click here) while we put in the new billing system. The billing system will be down for 6-8 hours and during that time, you will be unable to register new accounts or reopen old accounts. We would also ask that you make sure your account info is updated, current, Ts crossed and Is dotted, to make sure this transition is as smooth as possible and your service goes uninterrupted.
Also on Monday, we will be doing some work on the server hardware starting at 2pm Oslo time (for your local time, click here), so the servers will be down. We estimate 4 hours of downtime.
And the current plan is for the 17.6 update to be deployed to the live servers on 9 October.