Echo Dot - Correct Software

[nmee001]

How do tell if the software on my Echo Dot (UK purchased 2nd generation) is up to date?
In the Echo Dot app Settings it is currently showing '564186420'
on Amazon.co.uk - software - it says it should be '5.5.0.1'
on Amazon.com - software - it says it should be '561179520'

I am totally confused especially if Amazon don't know which way it should be numbered in the UK!

Anyone able to cast some light on which software is which?

[renegade600]

see the following though you may need to do your own google search for uk info.   

https://www.amazon.com/gp/help/customer/display.html?nodeId=201602210

[nmee001]

Just had the answer from Amazon Support that '564186420' is the correct software for the Echo Dot in UK or its equivalent Fire OS 5.5.02 which surprised me, especially when they said it has probably been updated earlier than the notes on the website.
Which they said should be updated in the next few days!!