Level3 DNS not resolving for our domains

[bortzmeyer at nic.fr (Stephane Bortzmeyer)]

On Wed, Dec 30, 2015 at 03:02:39PM -0600,
 Otto Monnig <omonnig at gmail.com> wrote 
 a message of 24 lines which said:

> Sorry for not providing domains - I did so intentionally, as I
> believe this is a policy change at L3, rather than a technical
> issue.

And how are we supposed to debug, without even one domain name?

Level 3 public DNS resolvers work fine for me (tested with several
names, both DNSSEC and not DNSSEC).