Possible, which is why I need to compare with another user.ACT scares me tbh. They have been known to intercept dns for even safe domains. I would not be surprised that they have started doing even nastier things now like intercepting secure traffic.
ACT Fibernet and OPENDNS
UPDATE: Just spoke to someone from their tech team. It is indeed blocked due to some DNS attack at their end. Even their own DNS server got compromised. They said it should be available in about a month.