how do you find your blocked numbers in Contacts or on your iphone?

Thanks Mario, but the article doesn't say anything on how to view the numbers you have already blocked. I figured it out. If you go into the Facetime settings & scroll to the end it says "blocked" & when you open, the list of blocked numbers is given. The same option doesn't show up under the phone setting nor are you able to access the blocked list through contacts. It doesn't make sense that the blocked numbers are viewed in the Facetime settings rather than the phone settings.