Just realized that Azeroth/USEast is currently down because Blizzard was trying to revert clans back to what they were before the upgrade on June 20th. Apparently, this reversion failed, and they're now trying to put the clans back to what they were before the maintenance started today. Hopefully this doesn't fail again

You can follow the thread here: https://forums.battle.net/thread.html?t ... 7844724728
Thanks to BnetDocs for putting the link up ^^
Edit: added link to bnetdocs
Edit2: Azeroth is now back online.