Log into your my verizon.
Hover over my verizon in the red bar at the top
go to manage my contacts
they will show up there if you have them backed up
you will see sync to phone in the top right
Also, you can sync back up assistant from your phone. If you have an iphone, it would be vz contact transfer. If you do either, ensure that you have NO contacts AT ALL. NONE. Otherwise, back up assistant will backup that list and replace it with the one you want.