To check blocked numbers on an iPhone, follow these steps:
1. **Open Settings**: Tap on the "Settings" app on your iPhone's home screen.
2. **Scroll Down and Tap on Phone**: In the Settings menu, scroll down and tap on "Phone."
3. **Tap on Blocked Contacts**: Within the Phone settings, you'll see an option labeled "Blocked Contacts." Tap on it to access your list of blocked numbers.
4. **View Blocked Numbers**: In the Blocked Contacts menu, you'll see a list of phone numbers and contacts that you have blocked on your iPhone.
5. **Unblock a Number (Optional)**: If you want to unblock a number, simply swipe left on the number and tap "Unblock."
6. **Exit Settings**: Once you've checked your blocked numbers or made any changes, you can exit the Settings app.
By following these steps, you can easily check and manage the list of blocked numbers on your iPhone. Any numbers you have blocked will not be able to call, text, or FaceTime you until you unblock them.