Block calls manually?
An incoming phone number that I want to block is not displayed in "Recents" but caller leaves a voice message containing their call back number. How can I block this number?
iPhone 13 Pro, iOS 15
If the number is not displayed in Recents, you can't block the number. Even if you could, businesses can spoof any phone numbers they want, so the next junk call from the same folks will come from a number that displays differently.