[dns-operations] EDNS(0) without any extensions is now being answered correctly by all TLD servers that support EDNS.

Paul Vixie paul at redbarn.org
Mon Dec 31 05:06:25 UTC 2018

Mark Andrews wrote:
> As of December 27 2018, all reachable TLD servers that support EDNS are running software
> that correctly answers EDNS(0) queries without a extension option being present.  The
> last two servers that were not compliant appear to have been replace on December 26.


> Network Working Group                                            P. Vixie
> Request for Comments: 2671                                            ISC
> Category: Standards Track                                     August 1999
>                   Extension Mechanisms for DNS (EDNS0)

so, one measure of the long tail for dns is, 19 years, four months. now 
we know?

thanks to all who made it happen, both earlier, and later, and the long 

P Vixie

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