54363 isn't free

After I wrote 'is this the shortest URL ever?', Nic Chilton says he has registered 'http://nboat.tk'.   

How short can a canal boat address get?

You could try checkdomain.com, which will tell you which letters relate to which countries.  (TK is Turkmenistan, a shady extension by my reckoning).  There's no country ending in '.nb'.

But, of course, length doesn't count as much as thickness.  What's needed isn't brevity but sense.

If you want a short domain for your boat, try the boat's registration number.  Granny Buttons is 54363.  Strangely, 54363.com was registered only a few months ago and I've missed out.   And the '.co.uk' extension is a bit too long-winded.

I registered grannybuttons.com nearly ten years ago.  Don't expect narrowboat.com or kingfisher.co.uk to be still available.

But you might find your boat number is still free.