Nothing in my comment had anything to do with "geographic spread" neither did I state they were a monopoly. My comment clearly states "it's not too far off."

Anti-trust law concerns the ability of a company to constrain competition. AT&T as the largest satellite provider(DirecTV) the seconds largest Cell Phone provider by customers and wireless spectrum holdings and now also owner of one of the largest media/content companies is very much in a position to "constrain competition. This potential to constrain competition was at the root of their failed $39 billion bid to buy T-Mobile 7 years ago.