I signed up with Slingshot VDSL and ordered a static IP. I'm a web developer and work with a bunch of IP-restricted systems. Unfortunately, the static IP is IPv4 only and the services (and the 'find my ip' type websites) were seeing the dynamic IPv6. This renders the static IP (at $10 a month) useless. 

I'm wondering if there is a 'good enough' way to check if a dynamic IPv6 belongs to me using the prefix/host, or even how often they change the dynamic IP. Otherwise, it's goodbye Slingshot :(