History of 4.2.2.2. What's the story?

[frnkblk at iname.com (Frank Bulk)]

We do.  It's at our upstream provider, just in case we had an upstream
connectivity issue or some internal meltdown that prevented those in the
outside world to hit our (authoritative) DNS servers.  Of course, that's
most helpful for DNS records that resolve to IPs *outside* our network. 

Frank

===
<snip>

For what it's worth, I have never heard of an ISP, big or small,  
deciding to place resolvers used by their customers in someone else's  
network. Perhaps I just need to get out more.

Joe