the service named is currently down.

[Bahman Niko]

All domains are affected.

 

[Richard G]

All domains are affected.

Yes but only these 3 are causing the errors, which most likely cause named to not start.

Backup your /etc/named.conf file to somewhere, then edit the /etc/named.conf and remove those 3.
Then restart named and see if it works.

 

[Bahman Niko]

You hit the target ?
But not for customer domains,
Rather, the server name was wrong in the list of domains itself, which caused interference in the launch of named service.
SUPER Richard G.?

 

[Richard G]

Great. Nice to see it's fixed now.
You're welcome.