Online, I believe that one bit of Beverley Hills has the highest number of online users in the USA.

I am one.

I have never visited California or the West Coast of the USA in my life.

But I have used dozens of websites which need a Zip code.

I have never had a Zip code. I have postcodes, like my old one IM2 3EW. That has letters. It won't fit a Zip code field.

So I and millions of others use the only Zip code we know:

Beverley Hills 90210.