Your post prompted me to investigate, because I've never seen a dynamic IP address offer from Verizon.
As far as I know, I've had a static address since I signed up for Verizon DSL, and I don't recall being offered a dynamic option at the outset (although that was a looong time ago, so I wouldn't bet on it).
The office that presumably deals with such stuff is closed for the weekend, so no more 'til Monday or so.
Update: Well, I'll be damned! My IP address
is dynamic.
Now, do I want to get into turning my modem on and off regularly for the minimal, if any, benefit to be derived?