When running a full node, why does the first inbound node have an unusual IP? When running getpeerinfo, most nodes show a standard addr like this:

95.121.82.153:8333


But the first inbound connection has a differently formatted addr like this:

[2a01:4f8:212:3b1f::2]:32220


What does this mean?
That's an IPv6 address.  Basically, it's the latest version for formatting/assigning IP addresses.  At some point, we should all be seeing a lot of those...but they've been saying that for years.