Companies using public IP space owned by others for internal routing

Harald Koch chk at
Mon Dec 18 19:34:29 CST 2017

On 17 December 2017 at 17:48, Tom Carter <m1enrage at> wrote:

> RFC1918 isn't big enough to cover all use cases. Think about a large
> internet service providers. If you have ten million customers,
> would be enough to number modems, but what happens when you need to number
> video set top boxes and voice end points? I don't think anyone goes out and
> says "Lets go use someone else's space, because I don't want to use this
> perfectly good private space".


They could use IPv6. I mean, if the mobile phone companies can figure it
out, surely an ISP can...


More information about the NANOG mailing list