Robocalls that hang up are mainly intended to verify your phone number. It indicates that the machine want to validate that the phone number is operational and that a live human answered the phone. Those calls will be quick, and they will usually end as soon as you say hello. If it's a long-winded speech, then you've got a spam call.
Restricted calls are mostly used by scammers to block your number. They will often call back in a few hours or days using another number. This way they can continue to send spam messages from your number even if you try to report it as such. Scammers also use restricted numbers to prevent their targets from blocking their calls.
There are two types of restricted calls: temporary and permanent. Temporary restricted calls will disappear after a certain period of time if you don't answer them. These calls usually come from non-geographic numbers and sometimes from voice mail services to ensure that they reach many people. Spam artists use various techniques to avoid having their phones blocked by people who have received temporary restricted calls. For example, they may use different phone numbers all over the world for each message they send.
Permanent restricted calls will never go away no matter how hard you try to contact them. Usually, these calls come from special numbers sold by phone companies to large organizations that want to stop receiving bulk calls.
Robocalls that hang up are mainly intended to verify your phone number. It indicates that the machine want to validate that the phone number is operational and that a live human answered the phone. Most fraudsters utilize equipment that creates phone numbers based on a single number from a specified area or operator.
According to a Hiya investigation, more than half of spam calls in 2018 have originated from "neighbor scams," in which scammers reproduce the first six digits of your own phone number down to the area code to deceive you into answering a call.
It's most likely a "Robo-Call"—most likely from an automated telemarketing organization. They have their computers make the first call, and after you answer, it is instantly routed to a waiting person who will try to swindle or sell you anything. Be sure to tell them that you're not interested before they get through all of their spiel.
There are several things that can cause you to get calls that just beep include: old credit cards that aren't being used any more, companies that don't exist any longer, friends or family trying to reach you, and even government agencies trying to inform you of some new law or regulation that affects you.
The only real way to stop these calls is not to pick up. However, if you must pick up, hang up immediately afterward so that they cannot continue calling you.
In addition, you should write down the phone number appearing on your caller ID screen and keep it in a safe place. You may want to block this number from reaching you entirely. Some phone companies offer this option, which means that when someone tries to call you using one of your numbers, they will get a message saying that you do not want to talk to them.
Finally, file a complaint with the FTC. They take complaints about telemarketers seriously and could put an end to your robocall problem.