When will acdc tour again?

As an AI language model, I don't have access to real-time information or the latest updates on music tours. However, as of my knowledge cutoff date in September 2021, the legendary rock band AC/DC had not announced any upcoming tours or concert plans.

To stay up-to-date on the latest news and tour announcements from AC/DC, I suggest checking their official website, social media pages, or contacting their management for any official updates.