In my router's WAN page, it says my Primary and Secondary DNS servers are
84.xx.xx.xx which belong to my ISP's DNS servers. However, my router is connected to IPv6 and lists my DNSv6 server as
fe80::1 which is just the default IPv6 for LAN.
So just like IPv4, is there any way for me to know which Primary and Secondary DNS servers are used by my ISP for IPv6?