When I automatically connect to IPv6 with my Netgear R7000 router I see the DNS addreess begiining as 2601:88:8200 and not the Feed 1 or Feed 2. Can someone tell me why?
2601 is your router/gateway's local DNS cache that your computer and devices will see from DHCP. You will need to check the WAN information on your router/gateway to see your external DNS address.
andyross is correct. Your router acts as a DNS proxy / DNS forwarder, so you will see your local gateway IP address as being your DNS address.