I've been working on a graphic to make teaching #IPv6 subnetting a little easier for engineers that are transitioning from #IPv4. One of the challenges I've run across is that textbook & training examples often use very simple patterns to illustrate IPV6 subnetting. However, when faced with a random assignment of a /48 prefix from an ISP, it's harder for engineers to wrap their head around how letters and numbers increment and where in the prefix that happens. Here is an example of a "real-world" IPv6 prefix (using the doc prefix) and we got from a /32 to a /48. Hope this is helpful!