[dns-operations] aws.amazon.com zone has only one nameserver

Valentin Bud valentin.bud at gmail.com
Tue Dec 8 12:35:45 UTC 2015


Hello Yonghua,

Fom where I am standing (.ro) things look differently, as it follows.

 ~$ dig +short aws.amazon.com ns in
ns-932.amazon.com.

~$ dig +short ns-932.amazon.com. a in
52.16.221.207

I guess that Amazon has geo aware DNS configuration in place.

Also I can find the A IN for ns-911.amazon.com and it matches yours.

~$ dig +short ns-911.amazon.com. a in
207.171.178.6

Best,
Valentin

On Tue, Dec 8, 2015 at 2:10 PM Yonghua Peng <pyh at cloud-china.org> wrote:

> Hi,
>
> As you see,
>
> ~$ idig aws.amazon.com ns
> aws.amazon.com.         587     IN      NS      ns-911.amazon.com.
>
> ~$ idig aws.amazon.com soa
> aws.amazon.com.         60      IN      SOA     ns-911.amazon.com.
> root.amazon.com. 1449536989 3600 900 7776000 60
>
> ~$ idig ns-911.amazon.com
> ns-911.amazon.com.      197     IN      A       207.171.178.6
>
> Do you know why this well known domain has only one nameserver, and it
> seems the nameserver has only one IP?
>
> Thx.
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