How can I transfer contacts from my iPhone 6 to my computer?
If they are backed up to the Verizon cloud, you can log in to your account on verizonwireless.com, go to My Device, and then My Cloud Media and Contacts, and download a csv file or Excel sheet with the contacts listed.
If the are backed up elsewhere (iCloud or iTunes) log in to that account and download the file as csv or Excel through that app.