How To Unmask No Caller ID On iPhone & Android? – Crack Down Unknown Numbers

In the era of digital communication, privacy has become a paramount concern. One feature that has been both a boon and a bane in this regard is the ability to make phone calls without revealing one’s phone number, commonly known as “No Caller ID”.

While this feature is beneficial for maintaining privacy, it can also be misused, leading to unwanted calls from unknown numbers. This comprehensive guide will walk you through the process of unmasking No Caller ID on both iPhone and Android devices, providing you with the tools to regain control over your phone calls.

Understanding the Concept of No Caller ID

no caller id

Before we delve into the process of unmasking No Caller ID, it’s crucial to understand what it entails. When a caller chooses to hide their number, their call displays as “No Caller ID” or “Unknown” on the recipient’s phone. This is achieved by entering a few digits before the number they wish to call.

For instance, dialing *67 before the number will automatically block the caller ID. This feature is often used by individuals who wish to maintain their privacy, but it can also be exploited by spammers and scammers to harass or trick unsuspecting individuals.

Unmasking No Caller ID: A Detailed Look at the Methods

There are several methods to unmask No Caller ID, each with its own set of advantages and disadvantages. Here are some of the most effective ones:

1. Contacting Your Phone Company

Contacting Your Phone Company

Phone companies keep detailed records of all calls made and received by their customers. Some of them offer an Anonymous Caller ID service, which can be activated using the *57 service. This star code reveals the unknown phone number and possibly other minor details.

However, not all carriers support this function, and those that do often charge a fee every time you use it. It’s best to contact your service provider to inquire about this feature and its associated costs.

2. Using TrapCall


TrapCall is a reliable service that allows users to unmask and block unknown numbers. The TrapCall app offers several features, including:

  • Unmasking any phone number: TrapCall can reveal the phone number of a No Caller ID call, allowing you to identify the caller.
  • Revealing the name, address, and photo of a caller with No Caller ID turned on: This feature can provide you with more information about the caller, which can be useful if you’re dealing with harassment or threats.
  • Blacklisting numbers: If you receive unwanted calls from a specific number, you can add it to your blacklist. Any future calls from this number will hear a message telling them that your number has been disconnected or isn’t in service.
  • Automatic spam call blocking: TrapCall maintains a database of known spam numbers and automatically blocks them, reducing the number of unwanted calls you receive.
  • Incoming call recording: This feature allows you to record incoming calls, providing you with evidence if you’re dealing with harassment or threats3.

To use TrapCall, you need to subscribe to the service by signing up on the official website. After that, you activate the service on your mobile phone. The process usually lasts around 5 minutes and is pretty straightforward.

3. Using Truecaller

How to Use Truecaller

Truecaller is another app that can help you unmask No Caller ID calls. It works by maintaining a vast database of phone numbers, which it uses to identify callers. When you receive a call from an unknown number, Truecaller checks its database and displays the caller’s details on your screen. This can help you identify spam calls and block them.

Blocking Unwanted Calls

How To Block Spam Calls

Once you’ve unmasked a No Caller ID call, you can block the number to prevent further calls. Here’s how to do it on iPhone and Android:

On iPhone (iOS 13 or later)

  1. Go to Settings.
  2. Scroll down and tap on Phone.
  3. Toggle Silence Unknown Callers to the On position.

On Android

  1. Open the Dialer on your Android Device.
  2. Tap the vertical ellipsis (three vertical dots) menu on the right-hand side of the app.
  3. Select Settings.
  4. Tap Block Numbers.
  5. Toggle Block Unknown Callers to the On position.

Common Spam Numbers

spam calls

While it’s impossible to list all spam numbers due to their sheer volume and the fact that they change frequently, here are a few common ones to watch out for:

Number Description
876 Area Code Often associated with Jamaican lottery scams
202 Area Code Commonly used for government grant scams
473 Area Code Known for “one ring” scams where the caller hangs up after one ring
809 Area Code Another “one ring” scam area code
900 Area Code These numbers are often associated with premium services and can result in high charges

Please note that while these numbers are commonly associated with spam calls, not all calls from these numbers are necessarily spam. Always use your judgment and never give out personal information over the phone unless you’re sure of the caller’s identity.


Can I unmask No Caller ID for free?

While some methods of unmasking No Caller ID are free, such as using certain features provided by your phone company, other methods may require a subscription or payment. For instance, apps like TrapCall and Truecaller offer free trials, but you’ll need to pay for their services after the trial period ends.

Is it legal to unmask No Caller ID?

Yes, it is generally legal to unmask No Caller ID. However, it’s important to use this information responsibly and not for malicious purposes. If you’re dealing with harassment or threats, it’s recommended to report the issue to law enforcement.

Can I unmask No Caller ID on landline phones?

Yes, it’s possible to unmask No Caller ID on landline phones as well. However, the methods may vary depending on your phone service provider. It’s best to contact your service provider for specific instructions.

Does unmasking No Caller ID reveal the caller’s location?

Some services, like TrapCall, can provide additional information about the caller, such as their name and address. However, this information may not always be accurate or available.

What should I do if I keep receiving spam calls even after blocking the numbers?

If you continue to receive spam calls after blocking the numbers, it’s possible that the spammers are using different numbers or spoofing their caller ID. In this case, you might want to consider using a spam call blocking app or service, which can help identify and block these calls.

Can I unmask No Caller ID calls that have already been made?

Typically, you can only unmask No Caller ID calls at the time they are made. However, if you have a service like TrapCall activated on your phone, it can unmask calls that come in while the service is active. For calls that have already been made, you may need to contact your phone company for call records.


While No Caller ID can be a useful feature for maintaining privacy, it can also lead to unwanted calls from unknown numbers. Fortunately, there are several methods to unmask these calls, allowing you to identify the caller and block their number if necessary.

Whether you choose to use your phone company’s services, an app like TrapCall or Truecaller, or your phone’s built-in blocking features, you can regain control over who can reach you by phone.