You know how, on cell phones, there is a bunch of special numbers you can dial that start either with a star or with a pound sign?

For instance, on Verizon you can dial Star-2-2-8 to update your roaming profile. Or pound-6-4-6 to check your airtime minutes.

Is there a comprehensive guide as to what all of these special numbers are? Can't find one in dox or on the Verizon site. Tried googling, got a lot of references to The Star tabloid.