<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Hi Yonghua,</div><p class="airmail_on">On 8 December 2015 at 13:16:40, Yonghua Peng (<a href="mailto:pyh@cloud-china.org">pyh@cloud-china.org</a>) wrote:</p> <div><blockquote type="cite" class="clean_bq" style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><span><div><div></div><div>Hi,<span class="Apple-converted-space"> </span><br><br>As you see,<span class="Apple-converted-space"> </span><br><br>~$ idig aws.amazon.com ns<span class="Apple-converted-space"> </span><br>aws.amazon.com. 587 IN NS ns-911.amazon.com.<span class="Apple-converted-space"> </span><br><br>~$ idig aws.amazon.com soa<span class="Apple-converted-space"> </span><br>aws.amazon.com. 60 IN SOA ns-911.amazon.com.<span class="Apple-converted-space"> </span><br>root.amazon.com. 1449536989 3600 900 7776000 60<span class="Apple-converted-space"> </span><br><br>~$ idig ns-911.amazon.com<span class="Apple-converted-space"> </span><br>ns-911.amazon.com. 197 IN A 207.171.178.6<span class="Apple-converted-space"> </span></div></div></span></blockquote></div><p>I’ve got different results, probably due to Amazon using anycast:</p><p>;; QUESTION SECTION:</p><p>;aws.amazon.com.<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS</p><p>;; ANSWER SECTION:</p><p>aws.amazon.com.<span class="Apple-tab-span" style="white-space:pre"> </span>446<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>NS<span class="Apple-tab-span" style="white-space:pre"> </span>ec2-52-19-138-45.eu-west-1.compute.amazonaws.com.</p><p><br></p><p>and</p><p><br></p><p>;; QUESTION SECTION:</p><p>;aws.amazon.com.<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>SOA</p><p>;; ANSWER SECTION:</p><p>aws.amazon.com.<span class="Apple-tab-span" style="white-space:pre"> </span>60<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>SOA<span class="Apple-tab-span" style="white-space:pre"> </span>ec2-52-19-138-45.eu-west-1.compute.amazonaws.com. root.amazon.com. 1449578784 3600 900 7776000 60</p><p><br></p><div><div><blockquote type="cite" class="clean_bq" style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><span><div><div>Do you know why this well known domain has only one nameserver, and it<span class="Apple-converted-space"> </span><br>seems the nameserver has only one IP?<span class="Apple-converted-space"> </span></div></div></span></blockquote></div><p><br></p><p>Again, Amazon using Anycast, that does not mean everyone is going to the same name server,</p><p>but that’s nevertheless weird.</p><p><br></p><p>Cheers,</p><p>-- </p><p>Nico</p></div></body></html>