VZ Coverage Locator
It's under support on the main homepage.
(continues)
http://www.berkana.com/tower.php3 »
Also, the FCC's list does not tell you if your cell carrier has equipment on somebody else's towers, only on towers they themselves own and control.
Of questionable usefulness, IMHO.
As most cellsite towers are less than 200' the site is pretty much useless and it also won't tell you what carriers are on the site as they aren't required to license each individual site like NEXTEL is required to do as they are still considered an ESMR radio licensee.