I think they have had/are having a massive outage. Lost internet at home from around 01:15. Mobile was intermittent from then too. Datacentre access is down. From their website:

Due to Third party planned work, some customers in Auckland region may experience a disruption to their Internet and Voice services, we apologise for any inconvenience this may cause. Our engineers are working to restore services. 

I just called their corporate line and didn't get through but they rang back after 5 mins. Apparently the guy I was speaking to said a full power loss occured at their Northcote datacentre but apparently the network is fully back. Still can't access multiple racks there including through different routers or out-of-band. It doesn't make sense, either the network isn't fully back as he said or the power loss is ongoing (and will need to visit). He is checking with their NOC and will call back.