About this app

«Callzzz - who calling?» is a great helper in the search of the phone number information.

The informational base about world telephone numbers is constantly updating.

We ask for access to the phone book to display the contact information in the call history.
Access to the call log is needed to show the call history, as well as convenient to search information by phone number clicking on a particular call.
To block unwanted numbers during a call and display information about incoming / outgoing numbers, we ask the access to direct calls.
To block SMS from unwanted numbers and display information about SMS in the application we request access to SMS.


Are you called from unknown number? Does your telephone show unknown numbers?
How to identify who is calling or has called if there is no incoming call in your phones’ directory contacts?

It may be dangerous to answer the incoming call from the unknown number, but you can miss some opportunity if you do not do it.

«Callzzz - who calling?» will solve this problem.
Do you want to identify the code of a country, region or city? Enter some code in «Callzzz – who calling?» and the application will give you all necessary information.
«Callzzz - who calling?» will identify a communications provider easily (Alltel, AT&T Mobility, Sprint,Nextel, U.S. Cellular, Verizon Communications, et al.).

§ Block up incoming calls.

Using this application, you can block up incoming calls from the certain number. Your line will be always engaged for the owner of the blocked number and he will not be able to ring you up.

§ Block up incoming SMS.

Using this application, you can get rid of spam and another useless information getting with SMS. Clear your SMS-messages of spam.

§ Get the information about the phone number while speaking.

You can easily find out the telephone subscriber’s communications provider while speaking. You just need internet connection.

§ Intelligent search.

If there is no information about the phone number in the base of «Callzzz - who calling?», the application will remember your demand and as soon as the information about the phone is added into the base, you will receive a push-message.

The country codes are accessible in «Callzzz - who calling?» off –line.

The following are accessible in the free version:
✓ Phone number review: communications providers (Alltel, AT&T Mobility, Sprint Nextel, U.S. Cellular, Verizon Communications, Verizon Wireless et al.), country,
region, city, users’ comments;
✓ Phone number review while speaking;
✓ E-mailing information: communications provider (Alltel, AT&T Mobility, Sprint, Nextel, U.S. Cellular, Verizon Communications, Verizon Wireless et al.), country, region, city;
✓ Possibility to comment the phone number;
✓ Adding the information about the phone number;
✓ One click instructs about the importance of the information;
✓ Blocking incoming calls;
✓ Blocking incoming SMS.

PRO - version:
✓Full phone number review: the information about the owner, addresses, the type of the contact, communications providers (Alltel, AT&T Mobility, Sprint Nextel, U.S.
Cellular, Verizon Communications, Verizon Wireless et al.), country, region, city,
users’ comments;
✓Full phone number review while speaking ;
✓E-mailing information: the information about the owner, addresses, the type of the contact, communications providers, country, region, city;
✓Possibility to comment the phone number;
✓No ads.

New features

✓ Block calls by country and by first digits
✓ fixed bugs

App Permissions

Allows applications to open network sockets.
Allows read only access to phone state, including the phone number of the device, current cellular network information, the status of any ongoing calls, and a list of any PhoneAccounts registered on the device.
Allows an application to read the user's contacts data.
Allows applications to access information about networks.
Allows an application to receive SMS messages.
Allows an application to read SMS messages.
Allows using PowerManager WakeLocks to keep processor from sleeping or screen from dimming.
Allows an application to initiate a phone call without going through the Dialer user interface for the user to confirm the call.
This constant was deprecated in API level 21. No longer enforced.
Allows an application to read the user's call log.
Allows an app to create windows using the type TYPE_APPLICATION_OVERLAY, shown on top of all other apps.