expired or non-authoritative domains

[Mark Andrews]

In message <2070cf420902060124ged41b99jf56a15306c9b22d1 at mail.gmail.com>, "Konst
antin N. Bezruchenko" writes:
> Hello,
> 
> I have a two DNS servers, which our customers uses to "host" their domains.
> 
> Sometimes customers forgot to renew domain, or just don't want to
> renew it, or they move domain to other name servers.
> However i still have records for this domains in my configs.
> 
> Is there any way to determine which domains are no longer use my name servers
> ?
> 
> Sure, i can write some script just to make queries to root servers,
> parse answers and look if domains is still refers to my nameservers,
> but i believe there must be some native way?

	Unless you are serving tld's you don't want to query the root
	servers.  You want to query the parent servers and yes that
	is the easiest way.
 
	Mark
> Thanks.
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-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org