Getting calls from unknown numbers can be irritating, but calls from No Caller ID can be even more infuriating. The mystery surrounding these anonymous calls can leave you feeling frustrated and worried. This is especially when they become persistent and amount to harassment.
If you’re tired of dealing with unidentified callers, it’s time to unmask them. In this article, we will provide methods to figure out No Caller ID, how to lookup a phone number in the USA to know who called or texted, and guide you on how to block No Caller ID numbers.
Phone scams have become prevalent, with millions falling victim to fraudulent schemes. According to the Internet Crime Complaint Center report, Americans lost more than $12 billion to fraud in 2023.
In 2022 alone, 1 in 3 Americans said they were victims of phone scams. Thus, it’s crucial to act and protect yourself from the potential threat of phone scams by knowing how to reveal who is calling even if the number does not reveal a Caller ID.

At HeyLocate, we understand the concerns and frustrations associated with No Caller ID calls. We have thoroughly tested various methods to unmask these mysterious callers. We’ll help you discover who called, do a free scammer phone number lookup, block such numbers, and reclaim control over your phone calls.
What Does No Caller ID Mean?
A No Caller ID means the caller has blocked their information from being displayed on your caller ID. The incoming call will not display the caller’s number. No Caller ID is different from Unknown Caller. Let’s explore the differences.
No Caller ID vs. Unknown Caller
Many people wonder if a No Caller ID call means the caller is someone in their contacts. Based on our research, we found a tweet by Brittney that claimed No Caller ID calls were from contacts hiding their identity and Unknown Caller is from an unsaved number.
Fun fact: if someone calls you and it says “No Caller ID” it’s someone on your contact list. If it says “Unknown” then it’s an unsaved number.
— Brittney (@brittsus) January 13, 2021
In fact, a No Caller ID call means the caller has disabled the Caller ID by inputting a special code like *67 before the number they want to call. They can do this for one call, or request their phone company not to allow their number to be visible on caller ID. This means you can have the number saved on your device, but it will not be displayed.
On the other hand, an Unknown call comes from a number you have not saved on your phone. While the caller ID was provided, your phone company did not recognize it.
How to Find a No Caller ID Number
To discover a No Caller ID number, use codes for call trace, spam and scam detecting apps or contact your phone company.
“The ability to identify such calls depends on several factors, including the technology used by the caller, the policies of the provider, and legal requirements. In some cases, providers may assist in identifying the caller, but it is not guaranteed”.

Codes for Call Trace
You can use specific codes to help trace the origin of a No Caller ID call. Major phone carriers like At&T provide codes like *57 to trace a call or identify information about a caller. If your phone company is AT&T, here are the steps to determine who a No Caller ID is.
Step 1: Hang Up the Phone
Hang up the phone if you have just received a call with no Caller ID, and press *57 (touch-tone) or 1157 (rotary). You should hear a confirmation tone and message if the trace is successful. Note down the time and date of the call to help you retrieve call trace Information.
If the call is not traced, you will hear an error message.
Step 2: Contact Your Local Law Enforcement Agency
At&T will only provide call tracing information to Law Enforcement officials. Thus, you will want to contact local law enforcement after you activate tracing the hidden call. Once you have informed the police, they will be able to give you the results of the traced call.
One of the ways that a person blocks their Caller ID is by adding the code *67 before the number they are calling. If someone has used this method to block their identity, you can press *69 to activate the last-call return service.
Most times, the service will auto-activate, however, if it doesn’t, press the call button. You will hear an automated recording of the last number that called you, as long as there’s any available Caller ID information. Note that some phone companies charge for this service.
Use Third-Party Apps
Another way how to unmask No Caller ID is by using third-party apps. These apps are available for Android and iOS, and they can help you see the caller’s identity, even if it’s a hidden phone number. These are some apps you can use to unmask unknown caller ID.
- TrueCaller will automatically unmask the No Caller ID and display the phone number calling you on the screen if the no Caller ID is someone in your contacts. In addition, it will display the person’s name if it’s in its database.
- Hiya is another efficient app to find out who a No Caller ID is. The app reveals the number and the name if it’s available in the app’s directory.
- Robokiller is a brilliant app that helps you figure out No Caller ID. It can also block 99% of spam calls from telemarketers, scammers, and robocalls.
- Showcaller can stop calls from No Caller ID and block them. It also has a record feature that allows you to record calls, especially if they are from a scammer.
- Trapcall works to figure out No Caller ID and block unwanted calls. You can use it to track digital scammers, record incoming calls for evidence, and block known scam callers and telemarketers.
- Tellows will not block No Caller ID. Instead, it identifies the number and lets you decide whether to pick up the call. It will also warn you if a known scammer is calling.
Contact Your Phone Company
Contacting your phone company is ideal if all other free options fail. Your phone carrier can provide you with the phone number of an unknown caller if the call is displaying as No Caller ID. Your phone service provider can also help you identify the numbers of all incoming calls such that you can find the owner’s identity if their information is readily available online or on the Yellow Pages.
Use Reverse Phone Lookup Tools
To find out unknown caller, you can try Google search, but more likely to reveal the phone number owner by using a reverse phone lookup tool. It is especially useful when you have discovered the phone number behind a no Caller ID, but you don’t know who they are.
Start with our HeyLocate Free Carrier Lookup. It focuses on providing basic carrier information to guide you on the legitimacy of a phone number. It displayed the network operator’s name, network type, and the operator’s area code. Thus, you can contact that carrier for further information.

If you would like more information about the phone number owner, you can use a professional and comprehensive reverse lookup service. However, usually, they require a subscription or a one-time payment for the report. These include TruthFinder, Intelius, Spokeo, Numberguru, and others.

How to Block a No Caller ID
When you receive a call from a No Caller ID number, you can block it to avoid future calls from it. These are the steps to take on an Android phone:
- Open the Phone app and tap on the three-dot menu icon in the top-right corner of the screen.
- From the menu, select “Settings” or “Call settings.”
- Look for “Block numbers” or “Blocked contacts.”
- Tap on “Add a number” or “Block a number.” Enter “No Caller ID” or the specific phone number you want to block.
- Confirm the blocking action by tapping “Block” or a similar option.
- The No Caller ID or specific phone number will now be blocked, and you won’t receive calls from it anymore.
These steps may vary slightly depending on your Android device’s manufacturer and the operating system version you are using. If you encounter difficulties, consult your device’s user manual.
For iPhones, read our article “How to find out an unknown caller number on iPhone”.
Conclusion
There you go, guys. Here’s how to unmask No Caller ID and block such numbers. Remember to hang up and immediately tap *69 or *57 to initiate a trace on the call.
Our top pick app to identify No Caller ID from someone in your contacts is Truecaller. However, if the call comes from a new number, Trapcall is your best bet for identifying that number.
After identifying who is calling with No Caller ID, you will want to learn about the caller’s name, location, and other essential details. HeyLocate can reveal crucial data about a caller’s location and mobile carrier.
TruthFinder and Intelius can help dig for the information you could spend weeks looking for from government offices.
If you can’t figure out the number calling with No Caller ID, after trying free apps, contact your service provider for how to trace No Caller ID and your local law enforcement. These guys are better equipped to stop No Caller ID calls, especially if they amount to harassment.
Frequently Asked Questions (FAQs)
You can use third-party apps like Trapcall to discover No Caller ID on iPhone. Dialing *57 or *69 to activate a trace on the number. Then, you can contact your phone’s carrier or the police to identify the phone number.
You can call back a No Caller ID by dialing *69 and following the instructions from your phone company.
Dial *57 or *69 immediately after hanging up to initiate a trace on a *67 number.
There are various methods of unmasking No Caller ID. First, apps like Truecaller will identify the number if it’s in your contact list. Your carrier may also provide this information.
*57 initiates a trace to the last number that called your phone.
The police can trace No Caller ID if you initiated a trace on the number after hanging up. However, it may be impossible to trace if the number is unavailable or was an out or area call.
People use No Caller ID because they don’t want you to see their information. It could be a telemarketer, a scammer, an organization looking for donations, etc.









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