The option is approved, it is well defined and can be registered as 

NN ; Structured DNS Error  ;  Standard ; [RFCXXXX] 

Olafur



> On Jun 16, 2026, at 18:02, David Dong via RT 
> <[email protected]> wrote:
> 
> Dear Ólafur Guðmundsson (cc: dnsop WG),
> 
> As the designated expert for the DNS EDNS0 Option Codes (OPT) registry, can 
> you review the proposed registration in 
> draft-ietf-dnsop-structured-dns-error-22 for us? Please see:
> 
> https://datatracker.ietf.org/doc/draft-ietf-dnsop-structured-dns-error/
> 
> The due date is June 30th.
> 
> If this is OK, when the IESG approves the document for publication, we'll 
> make the registration at:
> 
> https://www.iana.org/assignments/dns-parameters/
> 
> When the review is complete (or, if you have concerns that need to be 
> addressed, when the initial review is complete), we'll update the 
> Datatracker's "IANA expert review" state and send any comments to the 
> authors. Unless you ask us to wait for other reviewers, we'll act on the 
> first review we receive.
> 
> With thanks,
> 
> David Dong
> IANA Services Sr. Specialist
> 
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