[dns-operations] potential future same-quad open resolvers - 25.25.25.25 and 25.26.27.28

[Paul Wouters]

On Wed, 7 Nov 2018, Tony Finch wrote:

> It's fairly well known that Microsoft are using 25/8 as private address
> space - it leaks out in Received: headers from Hotmail / Outlook /
> Exchange Online. According to a thread on the mailop list in July 2016,
> Microsoft has an agreement with the MOD about their usage of this address
> space.

Same for Rogers/Fido in Canada, and I believe T-mobile in the US.

Paul