[dns-operations] Unpublished IP addresses for Google Public DNS
Rajesh Maskara
rajmask at microsoft.com
Thu Oct 12 00:21:52 UTC 2017
Are following two IP addresses used by Google Public DNS for DNS resolution?
172.217.42.2
172.217.42.4
These addresses are NOT included in published ranges:
C:\>nslookup -type=TXT locations.publicdns.goog. | findstr "172.217."
Non-authoritative answer:
"172.217.32.0/26 lhr "
"172.217.32.64/26 lhr "
"172.217.32.128/26 sin "
"172.217.33.0/26 syd "
"172.217.33.64/26 syd "
"172.217.33.128/26 fra "
"172.217.33.192/26 fra "
"172.217.34.0/26 fra "
"172.217.34.64/26 bom "
"172.217.34.192/26 bom "
"172.217.35.0/24 gru "
"172.217.36.0/24 atl "
"172.217.37.0/24 gru "
This is resulting in Traffic Managers like DYN etc to map the end-users incorrectly to CA, USA.
Thanks,
Rajesh Maskara
Microsoft
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