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CallBlocker identifies and blocks automatically the most dangerous phone numbers in the U.S.A. Block any call for free and be protected against the most common scams.

Block, identify and report suspicious phone numbers. Unknownphone.com brings you the most complete app to avoid phone scams, unwanted calls and extra charges in your bill. With more than 4.000.000 telephone numbers registered and identified in our website and a community with millions of users in the United States and around the world, Unknownphone.com has the pleasure to bring you its official app.

- Do you want to know who is calling you? Are you annoyed by unwanted calls? With our app you will be able to block any phone number you want.

(Activate in your iPhone the call block functionality in Settings -> Phone -> Call Blocking & Identification -> CallBlocker)

Search any phone number and check if it has been previously reported in UnknownPhone.com. Share your experience and warn our community.

Are you receiving calls and have no idea who is calling you? Do they refuse to identify themselves? Check the phone number with our application and find out who calls you. Verify the phone owner and block their calls.

- Get the latest and most updated information on telephone scams in the United States. Block suspicious phone numbers before they call you.


Unknownphone.com is the largest community on phone search and the biggest phone spam directory in the United States. With more than 4.000.000 identified phone numbers in more than 30 countries.

CallBlocker is Unknownphone.com’s official phone block app and you will be able to access all of our services from your iPhone.

Optional subscription to our service

- Unlimited credits. Get information for all numbers you want.
- Automatic detection and block of up to 2000 dangerous phone numbers in your country.
- Access without limitations all our records for any phone number.
- No ads.
- Auto-renewing subscription ($4.99 monthly / $9.99 3 months - price varies by country)

CallBlocker respects your right to privacy. Your phonebook will never be public.
Privacy policy: unknownphone.com/privacy-policy
Terms of use: unknownphone.com/terms-of-service

Payment for auto-renewing subscription to CallBlocker will be charged to your iTunes account upon confirmation of purchase. Subscription can be managed and auto-renewal can be turned off by going to the Account Settings on your device. To avoid renewal, you must cancel at least 24 hours before your subscription ends. Your account will be charged for renewal within 24-hours prior to the end of the current period.

What’s New

Version 1.3.4

We keep improving our app in our fight against spam calls, this is what is new in CallBlocker:

• iOS15 / iPhone 13 integration.
• Small bugs fixed.

Enjoy the app and stay safe!

Ratings and Reviews

4.5 out of 5
925 Ratings

925 Ratings

the game master : ) ,

Great app

I love this app because my moms phone is connected to my phone for some weird reason and whenever my moms friend calls my mom it happens to me too so now I can finally block them. First of all this is an amazing app because it is completely free! I didn’t pay anything to block anyone. Second, all the other apps cost money and I can’t get a job cause I am too young. Now I don’t have to get noisy call from my moms friends. Third, it is super easy to set up and block somebody or see if they are safe. And last but not least because since I play roblox on my phone sometimes when I get a call mid-game all the noise just completely stops and I can’t hear anything so I have to rejoin. This is very simple and not complex. If you got any problems this app will probably help you. I really recommend you this app.

-With lots of care, The0neAndOnlyNoob

The reba7 ,

Exceptional App!!!

Love it 😍 This blocks telemarketers, 800 numbers, and my old boyfriend!!! 😁 Not only can you block calls but you can look up numbers - this tells me what's a scam before I answer, then I block their number, and I never get another call from them!

Easy to set-up and within 2 minutes of downloading it was up and running with my contacts. It works fine on the free version, but the protection is way better if you go up in credits. But I really love that credits refresh weekly. You can keep going as a free user and if you don't have a lot of people to block free is probably more than enough.😁 This app is awesome!!

PS: If you have trouble, check your level of protection!! I wish someone told me that after I downloaded this. You may need more protection than your level. I had to update to get what covered my needs. A tiny adjustment to personalize it, and it works like a dream!

Roro$man ,


Every day I'll get calls from unknown numbers, and caller ids named "scam likely" and it was really annoying because I have to work and I don't want to turn my phone off incase a family emergency, so the spam calls always was a bother especially because it was a different number and location each time, but thanks to my mate who recommended me this app, I now barely get any spam calls! Any number i find suspicious i just block it. I even blocked my ex number lol! Definitely give this app a shot!

App Privacy

The developer, UnknownPhone.com, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Purchases
  • Contact Info
  • Contacts
  • Search History
  • Browsing History
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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