Traditional Culture Encyclopedia - Weather forecast - What does NW4 3NL mean in the London address?

What does NW4 3NL mean in the London address?

Zip code. The postal codes in the UK are divided very finely, basically one postal code for each building. Specific to London, NW4 is the northwest subdivision of North West. I’ll give you a zip code map so you can roughly see where it is.

http://www.doogal.co.uk/london_postcodes.php