Had an issue for a few days now trying to reach
https://ilibrary.co.nz/ which is the Invercargill Library.
Talked to their IT support guy this morning and he says its all 2 degrees customers and VF customers who use IPv6.
Turning off IPv6 and just using 4 is fine. IT support assure nothing has changed at the Library site, and he suggests its a routing issue with the above 2 ISP's.
Perhaps 2degrees could look it is, but its no biggy.