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

[Royce Williams]

Does anyone know of any UK plans to stand up open resolvers? I found a hint
of that this morning.

I stumbled on it after learning that Amazon now controls the entirety 3/8
(actually two /9s, acquired at different times). Back when Quad9 came out,
on a whim I surveyed all same-quad IPs, and 3.3.3.3 seemed like a natural
add. So on the Amazon news, I refreshed the survey:

https://gist.github.com/roycewilliams/6cb91ed94b88730321ca3076006229f1

... which is when I noticed this PTR:

25.25.25.25.in-addr.arpa domain name pointer a1.pdns.publicsectordns.gov.uk.

... and its sibling:

28.27.26.25.in-addr.arpa domain name pointer a2.pdns.publicsectordns.gov.uk.

25.25.25.0/24 and 25.26.27.0/24 are now separate /24 in UK Ministry of
Defence space. They were previously part of larger, publicly
undifferentiated blocks.

Royce
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