CNAME records in place of A records

Mark Andrews marka at
Mon Nov 9 05:40:12 UTC 2020

> On 9 Nov 2020, at 16:35, Matt Palmer <mpalmer at> wrote:
> On Sun, Nov 08, 2020 at 08:01:12PM -0500, Rob McEwen wrote:
>> except - don't forget that the root of a domain (that domain without "www."
>> or any other label) - cannot have a CNAME as the "A" record - fwiw...
> Yes.  I didn't think that was something that needed to be explained on NANOG,
> though.

Given the number of ISPs (and others) that ask ISC to support CNAME at the APEX
to whom we have to politely say:

	“No.  It is not permitted by this part of RFC 1034.”

	<quoted text>

It’s well worth reiterating.

> - Matt

Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742              INTERNET: marka at

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