1000s of users

[Michael Banta]

Hi.

I read a post the other day of someone saying they hosted thousands of 
DNS records, an ISP maybe.

My question is: do you simply go into the named.conf file and keep 
manually adding zone files in into the flat text file? Is that the 
standard way of  working with that many zones? Or is there some other 
helper utility to more easily manage that many zones.

Thanks
Mike