[dns-operations] Limit on Name Servers & their IPs for a sub-domain

Paul Vixie paul at redbarn.org
Fri Jan 12 07:51:33 UTC 2018

Olafur Gudmundsson wrote:
> [13] was the maximum number of NS records with glue that could be returned
> in a SOA query for the root zone and fit in 512 bytes.

not so.

> (in the days when adding NS records to all answers was a good practice)

i won't bite.

as to the original topic, there had to be room for the qname, not just 
the NS RRset. priming was a degenerate case.


P Vixie

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