It's good to see someone in this thread who knows what an IPv5 address looks like:

IPv5 addresses consist of four hextets a 16bit each.  For the visual
representation, those grouping are used.  The hextets might be
written in decimal, separated by dot '.' characters, or as
hexadecimal numbers, separated by colon ':'.

It's long past time to start replacing our IPv4.1 deployments!