No Caller ID vs Unknown Caller: Understand The Differences

Do you know the difference between no caller id and an unknown caller, or do you think both are the same?

Do you frequently get calls from unknown numbers without caller ids on your mobile phone and try some techniques to stop them? Don’t worry. We have the perfect solution for you.

Follow this article to learn more about them and the methods to block calls from a no caller ID VS unknown caller.

Difference Between No Caller ID and Unknown Caller

No Caller IDUnknown Caller
No Caller ID means the caller has purposely decided to prevent their number from appearing when they call. This is a feature that they use for all calls. Sometimes they use this feature for one specific person depending on their needs. If an incoming call is shown as an unknown number, the cellular network hasn’t been able to pick up the caller’s information. Most of the time, the caller ID will be provided, but the cellular network can’t find it. 
Some people use this as a prank call so that they can hide their numbers. But scammers use this method to hide their numbers.This could be a technical fault from the requested caller or the network setup. 
Either way, it would be good if you don’t pick calls from no Caller IDs. If someone wants to talk to you genuinely, they would have shown their Caller ID. Sometimes this can also appear as No Caller ID, depending on your cellular network. These calls can be identified by using some methods. 

Methods to Reveal an Unknown Caller

  1. *57 Technique
  2. Use True Caller App
  3. Contact The Phone Company
  4. Contact the Local Authorities

1. *57 Technique

When you receive an unknown call, open your contacts app and type *57. This will send an immediate request to your service provider and trace the previous caller’s number.

If the trace is found to be successful, you will receive a beep or confirmation sound on your phone. 

 no caller id vs unknown caller

If the trace is found to be unsuccessful, you will receive an unsuccessful beep sound, and the sound depends on the phone you use.

This service is called MCIS (Malicious Caller Identification Service). This is a paid one and is provided by all major companies. The fees will be added to your monthly bill. 

2. Use True Caller App

True Caller screens the incoming call details about unknown callers and identifies them. It also has identification tools that help block unknown callers and prevent those callers from reaching you. 

The main advantage is they help you automatically block a caller from a spam caller.

These services are available both in the google play store and apple app store. Follow the steps below to use true caller services.

. Use True Caller App
  • Open the true caller website on your system. 
  • Sign up for a new account if you don’t have an account.
  • Paste the number you got in the search bar and press enter.
  • If the search is successful, it will reveal the details of the unknown caller or anonymous call. 

There are many third-party apps available to identify unknown callers. 

3. Contact the Phone Company

A telephone company can also help you in identifying the unknown caller. These private number details of the unknown callers are available to your phone company.

If that particular number is trying to call you many times, threatening you, or harassing you, contact them to know that person’s details.

Because when you block a call, you won’t have the option to view the details of that phone call. This eventually leads you to contact the phone company.

It has a law that prevents the carrier from revealing the personal information of that caller. 

In some cases, they will reveal the details of that person if you are harassed or threatened by them.

Most companies will provide all the details until that date, like their name, address, and phone number.

To make this possible, you need the assistance of those relevant law enforcement agencies.

Tip: Note the date and time of that trap call. This will help you to provide the details to the phone company.

Also, millions of calls will be made daily using this carrier. Make sure you provide as many details as possible to trace that call. Note all the information when you receive a call from an unknown number. 

4. Contact the Local Authorities

One of the quick ways to identify the caller is to file a report to the police. This is the best action when you receive calls from unknown numbers repeatedly and if they threaten you.

You will be asked to give all the information regarding these calls. 

For example, the voices you hear, the time, the call list, and other essential details.

This helps the police to work with the network carrier to find the person behind that unknown call.

They have security agencies that use advanced techniques to track down the person behind that call. 

Steps to Block Unwanted Calls on Android Phone

Follow the steps below to block unwanted calls from an android phone.

Method 1

  • Open the Settings app on your android device.
image 70
  • Scroll down and click on Security 
Scroll down and click on Security 
  • Scroll down and click on the anti-harassment/ fraud option.
Scroll down and click on the anti-harassment
  • Click on call blocking.
Click on call blocking
  • Turn off unknown incoming calls. 
Turn off unknown incoming calls

This will block numbers from unwanted calls. 

Method 2

  • Open the contacts app or phone app on your cell phone. 
Open the contacts app or phone app
  • Open that contact.
Open that contact
  • Scroll down and click on the block. This will block that number. 
Scroll down and click on the block

Steps to Block Unwanted Calls on iPhone

Follow the steps below to block unwanted calls on your iPhone.

  • Open the Settings app on your iPhone. 
  • Scroll down and click on Phone.
Open the Settings app on your iPhone
  • Enable the toggle button that says silence, unknown callers.
Enable the toggle button

This way, you won’t receive any spam calls. When you receive a call from an unknown number, that call will automatically be blocked and appear as a missed one. 

Steps to Block Specific Numbers

Follow the steps below to block specific numbers.

Android User

  • Open the contacts app on your mobile device.
  • Tap on the contact in the recent tab.
  • Click the last circle that has the I icon in it.  
  • At the bottom screen, click on Block.
  • Click confirm. 

iPhone User

  • Open the contacts app on your iPhone.
  • Go to the recent tab.
  • Click on the I symbol.
  • From the menu, scroll down and click on the block this caller.
  • Click on block contact. 


I hope the above article would have given you an idea about no caller id vs unknown caller. These calls can sometimes be threatening and might frequently contact and disturb you.

It would be better to block those anonymous callers to avoid any disturbances in the future. 


Is It Safe To Answer No Caller ID?

No, it is not safe. It will put you in a dangerous situation. You could also become the victim of voice phishing. If they are genuine, let them leave a message for you. Then, you can decide whether to answer the call or not. 

What To Do If You Get A No Caller ID?

If you get a call from a no caller ID. Don’t answer the call. This could be hackers trying to gather information from you by pretending to be someone else. It is better to avoid such calls. But if they contact you frequently, try to block that call. 

Why Do Some Calls Say No Caller ID?

It means that the caller ID has been blocked from being displayed. Sometimes telemarketers use this technique to call you. These people purposely do that so you will not have any information about that person. They will also do some illegal activities. 

How Do You Find Out Who An Unknown Caller Is?

There are methods available like dialing *57 on your phone, using apps like the true caller to find out the person, contacting the phone company, and contacting the local authorities to find an anonymous caller id service.