If you want to get the phone number of a restricted number, you can use TrapCall (do a google search for it) It works pretty well, but I don't know how much it would cost for you.
If you just want to block restricted numbers, Verizon has a phone app called "Do Not Disturb" that's really easy to use. You can get it by texting "dnd" to "apps" (363 to 2777), or go look for it under Media Center or Get It Now... it also blocks all sorts of other stuff, too, and I use it because I used to get a lot of harassing calls from restricted numbers.