Matthew S. Hallacy writes:
> No, once a registrar pushes something into the 'root' zones, it stays
> there until removed.

It's not actually the root zone.  The root zone is what the root name
servers ([a-m].root-servers.net) serve.  It only contains delegations and
glue records for the top level domain (TLD) servers.  Registrars update name
servers records with a specific registry, who in turn updates the TLD zone.
For example, the .com zone is served from [a-m].gtld-servers.net.  (Note
that this is glueless.)

$ dnsq ns com d.root-servers.net
2 com:
453 bytes, 1+0+13+13 records, response, noerror
query: 2 com
authority: com 172800 NS a.gtld-servers.net
authority: com 172800 NS g.gtld-servers.net
authority: com 172800 NS h.gtld-servers.net
...

$ dnsq ns google.com d.gtld-servers.net
2 google.com:
164 bytes, 1+4+0+4 records, response, noerror
query: 2 google.com
answer: google.com 172800 NS ns1.google.com
answer: google.com 172800 NS ns2.google.com
answer: google.com 172800 NS ns3.google.com
answer: google.com 172800 NS ns4.google.com
additional: ns1.google.com 172800 A 216.239.32.10
additional: ns2.google.com 172800 A 216.239.34.10
additional: ns3.google.com 172800 A 216.239.36.10
additional: ns4.google.com 172800 A 216.239.38.10

-- 
David Phillips <david at acz.org>
http://david.acz.org/


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