How to Find Out an Unknown Caller Number on iPhone: Full Guide 2025

An “Unknown Caller” number on an iPhone typically appears when you receive a call from someone who has blocked their Caller ID information or when the caller’s information is not available. In such cases, the phone number or caller’s identity is hidden, and the screen displays “Unknown Caller” or “No Caller ID” instead of showing the caller’s name or number.

An increasing number of iPhone users are reporting unwanted and unidentified calls, ranging from persistent telemarketing calls to spam and even potential threats. Dealing with scam callers can be overwhelming, leading to a strong desire to identify and block them. And there are such ways that we will review.

In fact, over 56.2 million U.S. adults were impacted by spam and scam calls in 2023. However, only 20% of women and 33% of men downloaded the spam blocker app. In this article, we will reveal how to enable call screening features on your iPhone, do reverse phone lookups to discover everything about the caller, and how to block No Caller ID numbers using contacts if you would instead not get them at all.

What Does Unknown Caller/No Caller ID Mean on iPhone

“Unknown Caller” refers to a situation where the incoming call does not provide any identifiable information about the caller. This means that the caller’s phone number is not recognized or associated with any contacts stored in your device’s address book. It could be a legitimate call from someone whose number you don’t have saved, or it could be an unwanted call from an unidentified source.

On the other hand, “No Caller ID” refers to a situation where the caller deliberately hides their phone number and identity. This can be achieved by using a specific feature provided by their service provider or through third-party apps. “No Caller ID” calls are commonly associated with telemarketing, scam calls. The purpose of concealing their identity is often to make it difficult for recipients to block or identify the call.

It’s important to note that while “Unknown Caller” simply indicates a lack of contact information, “No Caller ID” implies a deliberate attempt to remain anonymous.

Ways to Find No Caller ID Number on iPhone

To find our No Caller ID number on iPhone, use call trace codes, dedicated apps or contact your phone carrier.

Activate Call Trace

Activating Call Trace is a service provided by some carriers that allows you to uncover the identity of a No Caller ID number on your iPhone. By utilizing this feature, you can trace the origin of the call and gather information about the caller. Here’s an overview of how to activate Call Trace:

1. Check with Your Carrier
   Start by contacting your mobile carrier’s customer support or visiting their website to determine if they offer the Call Trace service and if there are any charges. Not all carriers provide this feature, so confirming its availability is essential.
2. Understand the Process
   Each carrier may have its own specific instructions and codes for activating Call Trace. They will provide you with the necessary information and guide you through the process.
3. Dial the Activation Code
   Once you have the required information, initiate the Call Trace process by dialing the designated activation code on your iPhone. The code is typically a combination of numbers or special characters, such as *57 or *69.
4. Record the Call Details
   After activating Call Trace, note the date, time, and duration of the No Caller ID call. These details will be helpful when reporting the call or providing information to your carrier or police.

Use Third-Party Apps

Then, there are special tools to uncover No Caller IDs and track a phone number without them knowing.

Truecaller

Truecaller is a popular app for Android and iOS that helps identify unknown callers and block spam calls. The free version allows you to identify incoming and outgoing calls and block spam numbers, with the added benefit of a community-based spam list that identifies and blocks reported numbers.

In addition to caller identification and spam call blocking, Truecaller offers useful features like call recording, call history, flash messaging, integration with messaging apps, and scam phone number lookup after unmasking No Caller ID.

So, if you are looking for how to block unknown callers on iPhone, Truecaller serves as a comprehensive tool for managing calls and protecting against disruptions, making it an invaluable solution for addressing No caller ID, unknown calls, and spam calls.

ShowCaller

During my search for a solution on how to block No Caller ID on iPhone, I came across Showcaller, a free phone app available for both Android and iOS devices. It helps to identify incoming calls and block unwanted phone calls, making it easier to manage phone calls effectively.

One of the key features of Showcaller is its comprehensive Caller ID functionality. It allows users to see the caller’s name and phone number displayed on their device’s screen before answering the call.

Showcaller also includes a spam call detection feature, which allows identifying unknown caller’s number and block nuisance and fraudulent calls.

Trapcall

Trapcall is a service that helps users uncover the identity of blocked or private callers and provides additional call management features. It offers a free trial period for users to experience its functionalities before subscribing.

With Trapcall, users can unmask a private number and reveal the caller’s identity. In addition, the service offers voicemail transcriptions, and the ability to blacklist unwanted numbers. The call recording feature allows you to save and review important conversations.

So if you are looking for how to find no caller ID number on iPhone, Trapcall is an excellent choice. However, the tool is available for US users only.

Contact Your Phone Carrier

If you want to find the number of an unknown caller on your iPhone, reach out to your phone carrier, as they have the necessary tools and resources to help you. Follow these steps:

1. Gather all the relevant call information (for example; time of call).
2. Use the provided customer service number to contact your carrier.
3. Explain the situation and request their assistance in identifying the unknown caller.
4. Provide them with the details of the call.
5. Follow the instructions provided by your carrier to uncover the caller’s number, and be patient while waiting for the results.

How to Silence Unknown Callers on iPhone

Silencing unknown callers on your iPhone can help you avoid interruptions and unwanted calls from unfamiliar numbers. Here’s a step-by-step guide:

1. Open the Settings app, then navigate to Apps tap on Phone.
   
2. Select Silence Unknown Callers and toggle the switch next to it to the ON position. When enabled, your iPhone will automatically silence calls from numbers that are not in your contacts, recent calls, or Messages.
   

How to Block No Caller ID on iPhone

Follow these steps:

1. Open the Phone App, tap the Contacts tab at the bottom of the screen.
2. Tap the “+” icon to add a new contact. Enter “No Caller ID” as the name and use “00 00000000” as the phone number. Once entered, tap Done to save the contact.
   
3. Then, scroll down to locate the newly created “No Caller ID” contact in your Contacts list. Tap on it to open the contact details.
4. Scroll to the bottom of the contact details and select the option Block Caller.
5. A pop-up message will appear with the option Block Contact. Tap on it to confirm and block all calls from the No Caller ID.
   

How to Find Out Who an Unknown Caller is

When you have discovered the number that called you, you can start with a Google search to find out who an unknown caller is. But then there are special tools for reverse phone lookup.

When I was trying to figure out how to see unknown caller number on iPhone, I decided to try the well-known TruthFinder service. While the free version provided basic details such as the location and carrier, the information was not sufficient.

So, I purchased the detailed report. The report included details such as the owner’s name, address history, additional contact information, social media profiles, and even email addresses.

Additionally, TruthFinder offers a dedicated app for iPhone users in the United States. The app enhances the user experience by providing a convenient and streamlined way to perform phone number lookups, access reports, and stay informed while on the go. It simplifies the process and allows for quick access to the desired information directly from an iPhone.

Try TruthFinder

There are also other reverse phone lookup services you can try: Intelius, Spokeo, and Numberguru, among others.

Conclusion

Dealing with unknown callers and No Caller ID numbers on your iPhone can be a frustrating experience. However, there are methods and tools available to help you uncover the identity of these mysterious callers and block them effectively. Enabling call screening features on your iPhone, such as activating Call Trace provided by some carriers, can help you trace the origin of No Caller ID calls.

You can start by getting their basic information on HeyLocate to know their network provider and region.

Additionally, using a third-party app like Truecaller, or Trapcall can assist in identifying unknown callers and blocking spam calls. If you want to find out who a No Caller ID or unknown caller is, you can use tools like TruthFinder.

If you continue to receive disturbing calls, consider reaching out to your phone service provider or contacting the police for assistance for further investigation.