Companies using public IP space owned by others for internal routing

Large Hadron Collider large.hadron.collider at
Mon Dec 18 03:05:54 CST 2017


Welcome to IPv6, where you have technically-reserved-for-future-use 
space that should never actually need to be used. Quite likely, you can 
use something like 440::/16 as your private space, but please don't do 
that unless you've exhausted the true private space.

You're welcome.

On 17/12/2017 14:57, James Downs wrote:
>> On Dec 17, 2017, at 14:33, Matt Hoppes <mattlists at> wrote:
>> Had a previous employee or I discovered it on the network segment after we had some weird routing issues and had to get that cleaned up. I don't know why anyone would do that when there is tons of private IP space.
> Unless there isn't.. I've worked at more than one company that had used up all the private space. Then you have the cases where some M&A causes overlapping IP space. In addition, you'd also be surprised how many people just assign the entire 10/8 space into a flat IP space.
> -j

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