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A comment on I spent a week without IPv4 (2023). Parent comment

Re:I spent a week without IPv4 (2023) by throw0101c on Saturday December 20, 2025 @03:20PM (#46339257)
Is it per chance 100.64.0.0/10?

* https://en.wikipedia.org/wiki/IPv4_shared_address_space

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Re:I spent a week without IPv4 (2023) by WarOnPrivacy on Saturday December 20, 2025 @04:36PM (#46339856)
It could be 21.0/8

ref:https://old.reddit.com/r/tmobileisp/comments/1gg7361/why_is_...

I booted an LTE router using a T-Mobile SIM.

Within an hour I had changed WAN IP. Both were from AS749 US-DOD NIC

    in 33.79.135.0/24 & 21.140.100.0/24.
They were cgnat'd behind TMble's advertised asn.
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