OOOOOOOOOh, ok

You see, here, NA means "Not Applicable" which is to say that you don't have it

So I was like, "Oh! That's funny! He is adding a friend code even though he doesn't have one! Haha!" And I was like....hmm...he had the game......NA.....Not America? No.......hmm......North Korea? No.......wait, that's NK......North......Amigos? It's a Mexican game? Wait.......north OF amigos! That's America! So now I know that it means North OF Amigos. America! Geeze....why didn't you just say that?"
(lol, jk

North America. Don't want you thinking I'm THAT stupid......hehe....)