Even before accepting the call, I knew, thanks to the app, that somebody is calling me with an offer to check up on insurance contracts. So I declined the incoming call without worries and saved myself a lot of nerves. Big thank you to the developers.
Identification and rating of unknown phone numbers
Tip: start by searching for a number, e.g.: +64 9 870 5992
Stop telemarketing and spam calls
Introducing our new mobile app. It was designed to do exactly what you need – identify unknown phone numbers. It uses a unique database which contains more than 300 million identified phone numbers. They are recognized with the use of data from more than 100 websites.

The main strengths of the Call Insider app
Caller identification
A special screen informing about an incoming/outgoing call will show you an overview of the phone number rating even before the call connects.
Pop-up during an incoming call
If you don’t want to use the special Call Insider call screen, you don’t have to. You can view the information on the number you are calling in a pop-up window as well.
Call blocking
In developmentWe are working on the option to block all phone numbers that are not saved in your contacts and potentially harmful numbers. Coming soon.



Offline database
The app provides a downloadable database of phone numbers from more than 100 countries and lets you identify selected phone numbers even when you’re not connected to the internet.
100% data security
Your contacts stay safely in your phone. You phone number is not sent anywhere either, the app doesn’t know it and can’t even access it.
In development Notification after a call ends
Did you miss a call and don’t know who called? Call Insider will show you a notification with the caller’s name. Our app makes finding out who called very easy.
Unique database of numbers
Our database contains more than 300 million phone numbers. The data come from active users and more than 100 partner websites.
Easy to use
We have taken care to make the app navigation intuitive and as simple as possible. That’s why the app can only do what you really appreciate and nothing more.
Personal rating of numbers
Every user can rate unknown phone numbers. It is our big community that makes the app so popular and useful.
Ongoing development, updates
We take tips from our users and always add new functions. We want the app to stay up-to-date and compatible with most phones.
Free and ad-free
The app is completely free for everyone without restrictions. Your impression of the app is our top priority, so we don’t intend to change this model in the future either.
300 million numbers
And that’s a hefty portion. The phone number database is created by active users. We also use more than 100 partner websites from 34 countries in the world.
Download the Call Insider app and see for yourself how many recognized phone numbers you can find in your call history. You might be pleasantly surprised.
New Zealand
158,000United States
54,821,000India
54,046,000Brazil
12,482,000China
9,643,000Germany
6,784,000Russia
6,021,000France
4,611,000United Kingdom
3,894,000Italy
3,864,000Poland
3,081,000Australia
2,867,000Netherlands
2,269,000Spain
2,217,000Canada
1,952,000Colombia
1,763,000Ukraine
1,601,000Japan
1,561,000Belgium
1,542,000Turkey
1,253,000Sweden
1,184,000Austria
1,034,000Czech Republic
1,030,000Pakistan
1,026,000Norway
992,000Portugal
979,000Switzerland
846,000Romania
831,000South Korea
732,000Finland
704,000Denmark
609,000Bulgaria
539,000Argentina
527,000Mexico
456,000Indonesia
448,000United Arab Emirates
427,000Vietnam
424,000Slovakia
420,000Greece
313,000Peru
308,000Belarus
290,000Lithuania
280,000South Africa
278,000Croatia
205,000Estonia
200,000Latvia
194,000Algeria
187,000Hungary
178,000Taiwan
172,000Kazakhstan
157,000Morocco
153,000Slovenia
153,000Chile
149,000Ireland
143,000Georgia (country)
139,000Thailand
138,000Jordan
106,000North Macedonia
105,000Israel
98,000Serbia
94,000Albania
78,000Kenya
78,000Nigeria
76,000Saudi Arabia
75,000Luxembourg
71,000Bolivia
70,000Uzbekistan
69,000Ghana
64,000Myanmar
54,000Oman
51,000Puerto Rico
51,000Egypt
47,000Philippines
46,000Moldova
44,000Kuwait
43,000Kyrgyzstan
40,000Jamaica
38,000Cameroon
35,000Dominican Republic
34,000Hong Kong
33,000Nepal
33,000Bahrain
33,000Malaysia
31,000Ecuador
28,000Costa Rica
28,000Azerbaijan
21,000Venezuela
19,000Uruguay
19,000Cyprus
18,000Bosnia and Herzegovina
15,000Bangladesh
15,000Qatar
11,000
Call Insider app user reviews
The best app to find out who is calling you. Taking off one star for not being able to block calls, but overall a great app.
Samsung S21
I got a call regarding an ad on an auction server and the app helped me find out that it was a scam aimed at getting money from you through a fake website. To be honest, if it weren’t for the reviews in the app, I don’t know if I would have been able to tell.
Motorola Moto G32
It does what it’s supposed to. I say it’s great and thanks.
Samsung Galaxy A33 5G
Great app! It has a huge database with information on phone numbers. I have absolutely no idea where they get the information and why it is free! I hope it stays free in the future too.
Xiaomi Redmi Note 11S
Absolutely great – if only I had got the app earlier. 😟
Realme 8
Newest phone number ratings
Didn’t find the answer to your question?

Why do I have to grant the app access to my contacts?
It will sound counter-intuitive, but it is to protect your privacy. The app only needs access to your contacts so that it doesn’t send out to the server the phone numbers you have saved in your phone and so they are not unknown to you. Your contacts therefore stay safely in your phone. We will provide information on phone number ratings only for the phone numbers you don’t know, that is those for which it makes sense.
The app can be used as default or supporting. What is the difference?
If you use the app as your default, a special purple screen with integrated phone number rating will be used for making phone calls (call screen of the Call Insider app). If you use the app as a supporting one, you will keep the call screen you are used to and phone number ratings will be displayed optionally as a pop-up window.
Can the app access my phone number?
It can’t. The Android system doesn’t even allow automatic retrieval of the phone number from an inserted SIM card. That’s why various apps verify your phone number via an SMS or call-back, and you must provide it first.
What is the option to name a phone number (suggest a name) for?
When you name a phone number in the Call Insider app, next time you will immediately know who’s calling you without saving the number in your contacts. The suggested name is sent out to the server and if we accept it, all Call Insider app users will see the name displayed for the number. If we don’t accept it, only you will see it.
Which data does the app send out to the server and why?
When the app is in active use, you are sending out the numbers you want to get rating information for at that moment. You are sending us only the phone number itself, 100% anonymized, no other data attached. You never send any names, statistics, times, call history or phone numbers saved in your contacts. Your phone number doesn’t get sent anywhere; the app doesn’t know it and can’t access it. It is the emphasis on privacy and minimal data sharing that makes the Call Insider app unique.