RE: Authoritative Resources for Public DNS Pinging

[Mike Lewinski via NANOG]

> What else is like that and easy to remember and isn’t 1.1.1.1 ?

4.2.2.1, which IIRC predates both 8.8.8.8 and 1.1.1.1. 

Muscle memory still favors it. I think 4.2.2.2 might be anycast the same but 
never really looked hard at it.