The blocked caller goes to voicemail. And you can see a list of blocked calls by tapping the Voicemail option in the Phone app.
All blocked or missed calls will show up in the Firewall Recents call log. To get there, just tap Recents at the bottom of the app. You'll see the full history of all calls that came through as well as any outbound calls made through the app.
As mentioned earlier, you cannot get missed call alerts, messages, or calls from any number that has been placed on your blocked list. This is what it is supposed to be. Blocking a number means you don't have any business with that number whatsoever.
How to View Blocked Numbers on an iPhone
In one sentence, the best way to get missed calls from blocked numbers on iPhone is to initially unblock a particular number. It will help you see the notifications.
iPhone — Tap Search, tap the search bar, type in trapcall , tap Search, tap GET to the right of "TrapCall: Stop Block", and enter your Touch ID or Apple ID password when prompted. Android — Tap the search bar, type in trapcall, tap TrapCall: Unmask Blocked & Private, tap INSTALL, and tap ACCEPT.
To put it simply, a restricted number is what someone uses to prevent others from seeing their number. They've essentially blocked their number from public viewing so that nobody can access them. If you receive a call from a person or company using a restricted number, that means they don't want you to call back.
Make sure the iPhone is updated: Update your iPhone, iPad, or iPod touch - Apple Support. Also, update any carrier settings: If the issue continues after updating, ensure that any third-party apps that assist with blocking calls have been removed: How to delete apps on your iPhone, iPad, and iPod touch - Apple Support.
Typically, if any blocked caller tries to call you, it shows as 'Blocked'. It gets notified and stored on your phone's call history or voicemail.
How to View All Blocked Numbers
On the application main screen, select Call and SMS filter. and select Blocked calls or Blocked SMS. If calls or SMS messages are blocked, the corresponding information is displayed on the status bar. To view details, tap More on the status bar.
Launch the Phone app on your Android phone. Click on the menu option (three horizontal lines) that appears at the screen's top-left corner. Scroll down the Settings screen and tap on the Blocked numbers. Here, you will see the list of blocked numbers on your phone.