In the US, Metronet uses CGNAT. There's another local ISP which uses it. They use it because they're small, growing, and cannot afford enough v4 IPs. They al

In the US, Metronet uses CGNAT. There's another local ISP which uses it. They use it because they're small, growing, and cannot afford enough v4 IPs. They also have no plan to switch to IPv6.