If you are often on the receiving end of unwanted calls from unknown numbers, you may be frustrated and looking for ways to stop them.
Unfortunately, since you don’t know what this number looks like, you can’t block it. What are your options?
This article shows you everything you need to know to find out who this anonymous caller is.
How do callers hide their phone number?
First, how do these people hide their phone numbers when they call you?
Anyone can hide their number due to the No Caller ID feature. When you make this type of call, you appear as an unknown caller. All it takes is entering a few numbers.
Enter *67 before the number you wish to call. This action will block your caller ID automatically. The number you are dialing will look like this: * 67-555-555-0000.
No Caller ID feature is usually used to prevent tracking; However, some people abuse it for harassment and other illegal activities. That’s why you need to know how to detect caller id.
The next section shows you how to detect an unknown caller.

How do you know who the unknown caller is?
Knowing who the unknown caller is can allow you to block them and stop receiving their unwanted calls. Here are some of the different methods you can use to identify an unknown caller.
1. Contact your phone company
Since phone companies have your past call logs, they usually provide their customers with Anonymous Caller ID service. Depending on your carrier, you can activate the service *57. This asterisk code reveals the unknown phone number and possibly other minor details.
Unfortunately, not every carrier supports this functionality, and the ones that charge each time you use it. If the methods below don’t work for you, contact your phone carrier to see if *57 is an option to detect unknown callers. But, it is necessary that you ask for the star code right after the anonymous call.
2. Use TrapCall
TrapCall It is one of the most reliable services to detect and block unknown numbers.

TrapCall allows its users to:
- Unveil any phone number.
- Unhide the name, address and photo of the caller with the caller ID not turned on.
- Blacklist these numbers so that when they call back, they will hear a message telling them that your number has been disconnected or is not in service.
- Use the automatic blocking feature for spam calls.
- Use of recording incoming calls.

All you need to do to use TrapCall is to subscribe to the service by registering on the official website. After that, you activate the service on your mobile phone. The process usually takes about 5 minutes and is very simple.
After setting up TrapCall, you need to decline when you receive a No Caller ID call. Then TrapCall forwards the number to their system, unmasks the caller, and sends you a notification of the exact number and some additional information.
TrapCall works on both Android and iPhone smartphone devices. Unfortunately, this service is not available anywhere outside the USA.
TrapCall offers a free trial option. You can test it by registering over here.
Block unwanted calls
Fortunately, cell phone manufacturers have made it easy to block unknown callers using the built-in options. However, remember that many scammers try to use a different number each time.
Block unwanted calls on iPhone (iOS 13 or later)
- go to the Settings.
- Scroll down and tap phone.
- switch Silence Unknown Callers to me on me Site.
Block unwanted calls on Android:
- open the the recorder on your Android device.
- Click on vertical cutting (three vertical points) The menu is on the right side of the application.
- Choose Settings.
- Faucet block numbers.
- switch Block unknown callers to me on me Site.
Block specific numbers
Once the unknown caller number is detected, you can easily block it using the features of your smartphone.
How to block certain numbers on iPhone
Apple iPhone users can easily block calls by following these instructions:
- open the recent calls on your iPhone and go to the number you wish to block.
- Click on I With a circle around it to the right of the figure.
- Scroll down and choose caller block.
- Confirm that you want to block the number by clicking call blocking.
Once this happens, the caller will just get a message saying that you are not accepting calls or anything like that.
How to block specific numbers on Android
Android instructions vary by make, model, and software version, but the instructions should be pretty similar for most phones.
- Run the phone dialer.
- Click on Telephone number It is in your call log.newly “ tab.
- tap on I with a circle around it.
- Faucet roadblock at the bottom of the screen.
- Choose Sure.
Even though you have blocked the calling number, the user of that number will never know. They will receive a message similar to a phone that is not connected.
Frequently Asked Questions
Here is some additional information to help you better understand anonymous callers.
Can my phone provider tell me who the unknown caller is?
Unfortunately, providers cannot tell you the name of an anonymous caller. Otherwise, the privacy of the user and legitimate callers may be violated. Whether you are calling your mobile provider or landline provider, you cannot get this information from your carrier because it also does not track unknown callers.
Are anonymous calls dangerous?
While most of the phone calls you receive are benign and nothing more than a nuisance, one must be wary of any unknown calls. Of course, you should not answer these calls at all. This situation is due to scammers, and the number that you cannot see may be from an international area, which means that the carrier will charge you a heavy fee for a response. Also, if the caller is genuine and the information is important, he will leave a message.