Nope.[1] Exclusive franchise agreements are illegal under federal law since 1996. There is no competition because the business proposition sucks. The only sensible play in most places is to try and target a niche market of wealthy neighborhoods that'll pay for the triple play. That is prohibited under most franchise agreements.
Four nationwide competitors isn't a monopoly any more than Pepsi and Coke are, who own almost all soft drink brands.
[1] e.g. http://www.wilmingtonde.gov/docs/1320/3716Rev1.pdf (Second whereas paragraph).