nanog mailing list archives

Re: Detecting a non-existent domain


From: Daniel Roesen <dr () cluenet de>
Date: Tue, 23 Sep 2003 23:47:44 +0200


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


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