How to Block Unknown Callers & No Caller ID on iPhone

iOS has the feature that allows us to block a specific phone number from our contacts. It’s very useful when it comes to preventing repeatedly annoying calls from a phone number. But what if we want to stop all “Unknown” callers and “No Caller ID” calls from coming to the iPhone too? Is that possible?

I used to do a trick based on this feature to block unknown and No Caller ID on my iPhone as I created a contact called “Unknown” and “No Caller ID” then add them to the blacklist. It used to work pretty well, but now not reliably anymore.

Don’t worry! If you’re looking for a way to block unwanted calls on your iPhone, this article is what you need. Today, I’ll be showing you a clever workaround for this issue using the Do Not Disturb feature. If you also want to find out who’s hiding behind “No Caller ID”, I’ll show you how to do it as well.

How to Block Unknown Caller and No Caller ID Calls

With Do Not Disturb, you can silence calls, alerts, and notifications that you get while your device is locked. You can also schedule a time or choose who you’ll allow calls from. And here are the instructions to stop all “Unknown” callers and “No Caller ID” calls using this feature.

How to use DND to block no caller id on iphone

Step 1: Open the Settings app, select “Do Not Disturb”.

Step 2: Turn on Do Not Disturb by toggling on the “Manual” option. you’ll see the half moon icon in the status bar. This icon indicates that you’re currently in Do Not Disturb mode.

Step 3: Select “Allow Calls From” and choose “All Contacts”. Now only people in your contact list are able to call & send messages to you with ringing. Otherwise, the Do Not Disturb mode will silence your iPhone completely.

Next time you want to turn on this mode manually, just open the Control Center and tap on the half moon icon. You can also schedule for automatically turning on and off Do Not Disturb by toggling on the Scheduled option.


How to know who’s calling

We’re going to install a free app from the App Store called TrapCall. Here are the uses of the app:


  • Find out who’s hiding behind “NO CALLER ID”, Unknown & Blocked Calls!
  • Get the evidence you need to file a police report
  • Track down digital stalkers
  • Protect your privacy and safety
  • Make annoying unwanted calls stop
  • Record your incoming phone calls for evidence (requires our Ultimate package)
  • Avoid needing to change your number!
  • Get your voicemails as text and SMS or emailed to you

Each time you get a call from “No Caller ID”, just decline the call by tapping the sleep button twice so you can pass it over to TrapCall. Almost instantly, the service will send you a message with the name, real telephone number and address of their caller. That’s how simple it is from the user view.


How to block spam calls from Telemarketers or Robocallers

Apple doesn’t build a database of scam and fraud numbers. Instead, they let developers integrate third-party apps with your calling services via a framework called Callkit. These apps with their maintained worldwide data will help you get rid of spam calls from telemarketers and robocallers easily.

Check out this article to find out the best app for you and how to use it.

And I think that’s all we can do now to deal with the issue. What’s your solution? Share with us in the comments below.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.