<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div><span style="background-color: rgba(255, 255, 255, 0);">dig TXT locations.publicdns.goog.</span></div><div><span style="background-color: rgba(255, 255, 255, 0);"><br></span></div><div><span style="background-color: rgba(255, 255, 255, 0);">This will give you all addresses of Google’s public dns unicast backend.</span></div><div><span style="background-color: rgba(255, 255, 255, 0);"><br></span></div><div><span style="background-color: rgba(255, 255, 255, 0);">Warmly</span></div><div><span style="background-color: rgba(255, 255, 255, 0);"><br></span></div><div><span style="background-color: rgba(255, 255, 255, 0);">Roy</span></div><div><br>On 19 Oct 2017, at 16:44, Babak Farrokhi <<a href="mailto:babak@farrokhi.net">babak@farrokhi.net</a>> wrote:<br><br></div><blockquote type="cite"><div>
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<div class="plaintext"><p dir="auto">Hi,</p>
<p dir="auto">I have seen several addresses from 172.217.42.x as source address from Google resolvers. Here is a list of IPs I’ve seen recently:</p>
<p dir="auto">172.217.42.3<br>
172.217.42.4<br>
172.217.42.5<br>
172.217.42.6<br>
172.217.42.7<br>
172.217.42.8<br>
172.217.42.9<br>
172.217.42.10<br>
172.217.42.11<br>
172.217.42.14</p>
<br><p dir="auto">Kind Regards,</p>
<p dir="auto">-- <br>
Babak Farrokhi</p>
<br><p dir="auto">On 12 Oct 2017, at 3:51, Rajesh Maskara wrote:</p>
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<p class="MsoNormal">Are following two IP addresses used by Google Public DNS for DNS resolution?<o:p></o:p></p>
<p class="MsoNormal"> 172.217.42.2<o:p></o:p></p>
<p class="MsoNormal"> 172.217.42.4<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">These addresses are NOT included in published ranges:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">C:\>nslookup -type=TXT locations.publicdns.goog. | findstr "172.217."<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">Non-authoritative answer:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New""> "172.217.32.0/26 lhr "<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New""> "172.217.32.64/26 lhr "<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New"">
</span><span lang="ES" style="font-size:10.0pt;font-family:"Courier New"">"172.217.32.128/26 sin "<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span lang="ES" style="font-size:10.0pt;font-family:"Courier New""> "172.217.33.0/26 syd "<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span lang="ES" style="font-size:10.0pt;font-family:"Courier New""> "172.217.33.64/26 syd "<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span lang="ES" style="font-size:10.0pt;font-family:"Courier New""> "172.217.33.128/26 fra "<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span lang="ES" style="font-size:10.0pt;font-family:"Courier New""> "172.217.33.192/26 fra "<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span lang="ES" style="font-size:10.0pt;font-family:"Courier New""> "172.217.34.0/26 fra "<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span lang="ES" style="font-size:10.0pt;font-family:"Courier New""> "172.217.34.64/26 bom "<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span lang="ES" style="font-size:10.0pt;font-family:"Courier New""> "172.217.34.192/26 bom "<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span lang="ES" style="font-size:10.0pt;font-family:"Courier New""> "172.217.35.0/24 gru "<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span lang="ES" style="font-size:10.0pt;font-family:"Courier New""> "172.217.36.0/24 atl "<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span lang="ES" style="font-size:10.0pt;font-family:"Courier New"">
</span><span style="font-size:10.0pt;font-family:"Courier New"">"172.217.37.0/24 gru "<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This is resulting in Traffic Managers like DYN etc to map the end-users incorrectly to CA, USA.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<br>
Rajesh Maskara<o:p></o:p></p>
<p class="MsoNormal">Microsoft<o:p></o:p></p>
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