How To Find out Who an Unknown Caller Is

If you are frequently on the receiving end of unwanted calls, and you know who the caller is, you can use your smartphone’s options to block that specific number. However, the problems start when someone is calling you from a masked, unknown number.

Since you don’t know what that number looks like, you can’t block it. But this article will show you everything you need to know in order to find out who that unknown caller is.

Masked Unknown Numbers

First, how do these people actually hide their phone numbers when they call you?

The answer is quite simple and it has been used for a long time, even before the age of smartphones.

Anyone can hide their number because of the No Caller ID feature. When you make this type of call, you appear as an Unknown Caller. All that it takes is entering a few digits.

Simply enter *67 before the number that you wish to call. This will automatically block your caller ID – that is, it will make it invisible to the person who is receiving the call.

The No Caller ID feature is usually used to prevent tracking. However, some misuse it for harassment and other illegal activities. That’s why you need to learn how to unmask the caller’s number.

The following section will show you how you can do that.

No Caller ID

Unmasking Unknown Numbers

Call Your Phone Company

Since phone companies have records of your previous calls, they usually provide their customers with the Anonymous Caller ID service. So how does this work?

Basically, this service automatically checks the authenticity of every call that you receive on your phone.

Let’s say someone tries to call you from an unknown or restricted number while this service is enabled. In order for the caller to proceed, they will have to unmask their number. Once the number is unmasked, you will be able to see it on your screen. To enable this service, simply call your telephone company and notify them that you are receiving unwanted calls from an unknown number.

Unfortunately, not all companies offer this service, but the only way to make sure is to call your provider and ask them about Anonymous Caller ID. If your provider supports the feature, the operator will ask you for the date and time when you received these calls. Additionally, they might need to know your name and address.

After that, the operator will try to unmask the number that has been calling you, and the feature should be enabled.

For those using a phone provider that does not offer this type of service, there are other options. It’s important to keep in mind that some providers do not provide call information over the phone, even when you’ve provided the proper account verification. You can pull your call logs from your online account although it may not show who the unkown caller was.

Use TrapCall

TrapCall is one of the most reliable services that people use to unmask and block unwanted numbers from calling ever again. This company has been providing this service since 2007.


The TrapCall app allows its users to:

  1. Unmask any phone number.
  2. Unmask the name, address, and photo of a caller with No Caller ID turned on.
  3. Put these numbers on a blacklist, so that when they call again, they will hear a message telling them that your number has been disconnected or isn’t in service.
  4. Use automatic spam call blocking.
  5. Use incoming call recording and more.

TrapCall signin

All that you need to do in order to use TrapCall is subscribe to them by signing up on their official website. After that, they will ask you to activate the service on your mobile phone.

The process usually lasts around 5 minutes and it is very easy to accomplish all of the required steps.

Once you have successfully activated the TrapCall service on your mobile phone, you will be able to unmask the numbers that are calling you and figure out who that person is.

When you receive a No Caller ID call, you need to decline it. After that, the call will be redirected to TrapCall. TrapCall will then unmask the caller and send you a notification with the exact number and additional info.

The TrapCall service works on both Android and iPhone smartphone devices. Unfortunately, this service isn’t available anywhere outside the United States of America.

The TrapCall service offers a free trial option for future users. You can test it all out by signing up here.

Blocking Unknown Callers

Fortunately, cell phone manufacturers have made it simple to block any unknown callers. You may be curious about who’s trying to reach you, but if you’re over the harassment or constant calling you can block unknown callers.

iPhone – iOS 13 or later

  1. Go to ‘Settings’
  2. Scroll down and tap on ‘Phone’
  3. Toggle the ‘Silence Unknown Callers’ option off.


  1. Open the Dialer (or phone app) on your Android Device.
  2. Tap the three vertical dots on the right-hand side of the app.
  3. Tap ‘Settings’
  4. Tap ‘Block Numbers’
  5. Toggle the ‘Block Unknown Callers’ option on.

Block a Certain Number from Ever Calling Again

These two methods allow you to find out who is hiding behind those No Call ID calls. Once you figure out their numbers and identities, you will be able to easily block them by using your smartphone’s features.

Although you may have to save the number as a contact on some models, blocking phone numbers is quite easy.


Apple iPhone users can easily block calls by following these instructions:

  1. Open the dialer on your iPhone and scroll to the number you’d like to block.
  2. Tap the ‘i’ with a circle around it located to the right of the number.
  3. Scroll down and tap ‘Block Caller’

Once this happens the caller will only receive a message stating that you’re not accepting calls or something of that nature.


Android instructions vary depending on make, model, and software version but the instructions should be fairly similar. Open the Dialer on your Android and follow these steps to block callers:

  1. Tap on the phone number located in the ‘Recents’ tab in your call log.
  2. Click the ‘i’ with a circle around it.
  3. Tap ‘Block’ at the bottom of the screen.
  4. Confirm

Although you’ve blocked the number that is calling, the user of that numer will never know. They will receive a message similar to a disconnected phone.


One thought on “How To Find out Who an Unknown Caller Is”

Avatar Wilson H. says:
Thanks for the CallTrap tip, there are so many fraud and info stealers on the web (even app store). I thank you very much for an honest review of a problem that many of us have, as well as a sensible solution.

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