These all lead to the same master list . Unblocking in any one place unblocks across Phone, Messages, and FaceTime.
Note: On older iOS versions, you can find directly on the main Settings screen. Scroll down to the bottom and tap Blocked Contacts .
For a quick visual walkthrough on navigating these settings:
If you are hesitating about keeping someone on this list, here is a quick reminder of what happens when you block a contact on iPhone:


Click on Download to install and test this Excel add-in for Windows.
Click on Upload to let us convert a spreadsheet for you for free.