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- Well quad9 isn’t that bad: - Primary DNS: 2620:fe::fe Secondary DNS: 2620:fe::9 - That’s 75% more digits and 50% more colons. 
 
- best I know is 2600::1 and 2600::2 
- If you ever need an easy one to test for E2E IPv6 connectivity then 2600:: works too. Useful to remember. 



