<div dir="ltr">Hello Yonghua,<div><br></div><div>Fom where I am standing (.ro) things look differently, as it follows.</div><div><br></div><div><div> ~$ dig +short <a href="http://aws.amazon.com">aws.amazon.com</a> ns in</div><div><a href="http://ns-932.amazon.com">ns-932.amazon.com</a>.</div></div><div><br></div><div>~$ dig +short <a href="http://ns-932.amazon.com">ns-932.amazon.com</a>. a in</div><div>52.16.221.207</div><div><br></div><div>I guess that Amazon has geo aware DNS configuration in place.</div><div><br></div><div>Also I can find the A IN for <a href="http://ns-911.amazon.com/" rel="noreferrer" target="_blank" style="line-height:1.5">ns-911.amazon.com</a> and it matches yours.</div><div><span style="line-height:1.5"><br></span></div><div><div>~$ dig +short <a href="http://ns-911.amazon.com">ns-911.amazon.com</a>. a in</div><div>207.171.178.6</div></div><div><br></div><div>Best,<br>Valentin</div></div><br><div class="gmail_quote"><div dir="ltr">On Tue, Dec 8, 2015 at 2:10 PM Yonghua Peng <<a href="mailto:pyh@cloud-china.org">pyh@cloud-china.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
As you see,<br>
<br>
~$ idig <a href="http://aws.amazon.com" rel="noreferrer" target="_blank">aws.amazon.com</a> ns<br>
<a href="http://aws.amazon.com" rel="noreferrer" target="_blank">aws.amazon.com</a>. 587 IN NS <a href="http://ns-911.amazon.com" rel="noreferrer" target="_blank">ns-911.amazon.com</a>.<br>
<br>
~$ idig <a href="http://aws.amazon.com" rel="noreferrer" target="_blank">aws.amazon.com</a> soa<br>
<a href="http://aws.amazon.com" rel="noreferrer" target="_blank">aws.amazon.com</a>. 60 IN SOA <a href="http://ns-911.amazon.com" rel="noreferrer" target="_blank">ns-911.amazon.com</a>.<br>
<a href="http://root.amazon.com" rel="noreferrer" target="_blank">root.amazon.com</a>. 1449536989 3600 900 7776000 60<br>
<br>
~$ idig <a href="http://ns-911.amazon.com" rel="noreferrer" target="_blank">ns-911.amazon.com</a><br>
<a href="http://ns-911.amazon.com" rel="noreferrer" target="_blank">ns-911.amazon.com</a>. 197 IN A 207.171.178.6<br>
<br>
Do you know why this well known domain has only one nameserver, and it<br>
seems the nameserver has only one IP?<br>
<br>
Thx.<br>
_______________________________________________<br>
dns-operations mailing list<br>
<a href="mailto:dns-operations@lists.dns-oarc.net" target="_blank">dns-operations@lists.dns-oarc.net</a><br>
<a href="https://lists.dns-oarc.net/mailman/listinfo/dns-operations" rel="noreferrer" target="_blank">https://lists.dns-oarc.net/mailman/listinfo/dns-operations</a><br>
dns-jobs mailing list<br>
<a href="https://lists.dns-oarc.net/mailman/listinfo/dns-jobs" rel="noreferrer" target="_blank">https://lists.dns-oarc.net/mailman/listinfo/dns-jobs</a><br>
</blockquote></div>