Caller ID
It is illegal to make telemarketing calls with an anonymous caller ID. However, dishonest salespeople do this anyway, and you end up being disturbed by these calls. It is usually at the worst time of day when you dine or relax at night.
There is a way to see the caller ID of anonymous callers. However, it will cost a little to do this. You need to temporarily use a toll-free number and forward your local line to it. These numbers can be obtained for only $ 2 per month without a contract.

How does it work

The trick is based on how billing information `is transmitted over the telephone network. When you use a toll-free number to receive calls, the telephone company is required to show the caller’s ID even if the caller is blocking.
The law requires this because you are paying for the call. Therefore, you deserve to know the details of what you are paying for, and this includes seeing who the caller is.
So how does this help if the unknown callers are bothering you by calling your local phone or cell phone? Here is the trick. You need to forward your local or mobile number to a toll-free number you have. Toll-free numbers cost only $ 2 per month from service providers like Kall8.
Now, it is essential to clarify this part. You can not leave your direct dial number for your local number if your local number is also forwarding to your toll-free number. You can see why. This creates an infinite loop that leads nowhere. Therefore, you need to set your toll free number to always go to voice mail.
You will have to call everyone who left a message for you, but at least you will be able to see the caller ID of all callers, including the one that is harassing you with anonymous calls.

Viewing Caller ID

All service providers allow you to access a record of all calls, usually accessing your account. These logs also show the size of calls.
Once you succeed in capturing the anonymous telemarketing operator and have your number, you can report it to the authorities and discontinue the free service. Assuming you no longer need it for anything else.
If you used a toll-free Kall8 number, you could cancel the service at any time. They do not require a long-term contract. You only pay for the months that the service is active.

An alternative method for responding to live

Instead of using voicemail for a reason I mentioned above, if you have another local number to which you have access, forward your toll-free number to that number. By doing this, you will be able to answer incoming calls and see the caller ID on the spot!
There is no need to check the log in this case. The caller ID is passed to the phone to which you are transferring.
Sometimes it’s worth spending a bit to arrest someone who is bothering you. Your piece of mind is what counts.