How to block all unknown numbers on iphone

No, it's not your imagination. There's a virtual tsunami of robocalls sweeping American phones these days, with 46% of Americans reporting getting unwanted calls daily in 2021. 

Since many of these calls arrive as private calls — with their Caller ID marked as "Unknown" — you can dramatically reduce the number of calls you get by blocking them.

Unfortunately, Apple doesn't give you an easy way to block Unknown, Private, or No Caller ID calls on your iPhone, but there are a few workarounds you can try.

How to block private calls on an iPhone using Do Not Disturb Mode

This is the most effective way to limit calls from private and unknown numbers, but it's not without its disadvantages.

You can turn on the iPhone's Do Not Disturb mode, but configure it to allow calls from numbers in your contacts list to go through. 

All unknown calls will go to voicemail (which isn't terrible, because most robocalls won't leave a message), but so will any legitimate calls that aren't already in your contacts list.

If you try this approach, you'll want to keep an eye on your voicemail for important calls. 

1. Start the Settings app, tap on Focus, and then tap Do Not Disturb.

Tap More

 

 Call history

.

Tip: If visual voicemail is on, blocked callers cannot leave voicemails.  Learn how to turn on visual voicemail.

Block unknown numbers

1. Open your Phone app .
2. Tap More
   
   .
3. Tap Settings
   
    Blocked numbers.
4. Turn on Unknown.

This will block calls from private or unidentified numbers.  You will still receive calls from phone numbers that are not stored in your contacts. 

How do I block unknown numbers automatically?

How do I block strangers numbers on my iPhone?

Can you block all no caller ID numbers?