Companies using public IP space owned by others for internal routing

valdis.kletnieks at valdis.kletnieks at
Wed Dec 20 02:28:53 CST 2017

On Tue, 19 Dec 2017 17:03:36 -0600, Bryan Holloway said:
> Comcast, at least in my neck of the woods, hands out /56s.

Hmm.  Odd.  Around here, they're handing out /60s.  Which is OK, since I'm
living in a 3 bedroom apartment that can be covered by one router. If I had to
do downstream delegation to another router at the other end of a large house,
I'd want a /56 so I can delegate a /60 to the far router so it could farm out /
64s, and I'd still have address space to carve /64's out of at the head-end

(Actually, a /59 would allow that, but PD on non-nybble boundaries is just crazy talk ;)

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