North American Network Operators Group
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Re: Detecting a non-existent domain

  • From: Daniel Roesen
  • Date: Tue Sep 23 18:01:30 2003 
On Tue, Sep 23, 2003 at 04:24:32PM -0500, Dominic J. Eidson wrote:
> Look for a SOA record for the domain - this should be the proper way to
> check for the existance of a domain,

No, because there doesn't _have_ to be a SOA RR for a 2nd level
domain. For example, in the .de TLD, there are (many) domains
which have their RRs (A, MX) in the de. zone file, NOT being
delegated to another NS RRset.

Example: fsck.de


Regards,
Daniel