Lines you remember from a movie of TV show but can't remember exactly where it originated from

A comedy where a guy is given an (obviously) fake phone number, and exclaims (after a beat) – “Hey, that’s one of those ‘555-‘ numbers!”

It’s on the tip of my tongue…

Woman says "it's a free country, isn't it?"

V fussy British man replies "What, Britain? Good lord no."

Have no idea where I picked this up, maybe a Le Carré thing? Anyway I think about it all the time, and am always on the lookout for someone to ask me if it's a free country as a result so I can use it.