DNS O Matic not updating

[tl5k5]

Hello all,
I'm having issues with DNSOMatic updating.
http://myip.dnsomatic.com/ returns my proper WAN address.
For the HOST setting I entered:  updates.dnsomatic.com
This returns a Cached IP of 0.0.0.0
If I put anything else in the HOST field it returns N/A.

https://dnsomatic.com/wiki/api shows an "all.dnsomatic.com" which is supposed to update all accounts linked to the service.  But this also returns Cached IP of N/A.

Anyone have an idea of what's going on?

Thanks!