Seriously......where do i live?

marky

N19 is Upper Holloway (which includes archway). London postcodes are in alphabetical order (except for the most central ones eg N1). N18 is upper edmonton, N20 Whetstone etc

wisteria53

The 1 code goes to the location of the district office and closest to the centre of London: ie N1 Islington, NW1 Camden. Then they're alphabetical, which is why N2 East Finchley is further out than N4 Finsbury Park. N7 is Holloway, N8 is Hornsey (which includes Crouch End). None of the numbering used to make sense until this was explained to me, but then I'm foreign.