Cox has made great efforts to support IPv6 as much as possible. There are a few things you need to know about how Cox Internet supports IPv6 and how you can take advantage of them: 1) All Cox customers get free access to dual-stack (IPv4 & IPv6) service by default at no extra charge until December 31st, 2020. 2) Customers with Home Office plans or higher can upgrade their service at any time after a free