some land line phone companies allow you to block all private or unknown numbers......If you can check your account from your computer you can do it that way or call your phone company. As far as cell phones Im unsure.
To block an incoming call, open your phone's call log and find the number you want to block. Tap on the number, then select the option to block or report the call, which may be labeled as "Block number" or "Add to reject list." Alternatively, you can go to your phone's settings, navigate to the "Call" or "Phone" section, and find the call blocking options to add the number manually. This will prevent calls from that number in the future.
To change your phone number to unknown or block your caller ID, you can typically dial *67 before the number you wish to call. This prevents your number from being displayed on the recipient's caller ID. Additionally, you can adjust settings in your phone or contact your mobile carrier for options to permanently block your number. Keep in mind that some recipients may still see your number depending on their phone service.
Star 67 is a feature on some phone systems that allows the caller to block the display of their phone number when making a call. By dialing *67 before dialing the recipient's phone number, the recipient will see "Private Number" or "Unknown Caller" on their caller ID.
"Unknown" on a caller display phone typically indicates that the caller's identity is not being transmitted to your device. This can happen for various reasons, such as the caller choosing to block their number, an issue with the phone network, or the call originating from an unlisted or private number. It could also mean that the caller is using a service that does not reveal their number.
Call it from an "unknown" (blocked number) or from a different number.
Your phone carrier will block it for you, you just have to go to the store and ask them to block it or you could call them depending on the network
For cell phones call from the cell phone 888-3821222
In order to block your phone number when dialing out, you must first press *67, and then dial the number. This allows you to call someone without your phone number being available to the person you are calling.
To block a number on a Kyocera cell phone, open the Phone app and go to the call log or recent calls. Find the number you want to block, tap on it, and select the option to block or add to the reject list. Alternatively, you can go to the Settings menu, choose "Call," and then "Call Blocking" to manually add the number. Once blocked, calls and messages from that number will no longer reach you.
When no one answer your phone call block it do *67 and whatever the number is or you could use a different phone
To block unknown callers on your smartphone, go to your phone's settings and look for the "Phone" or "Call" section. There, you can find options like "Call Blocking" or "Silence Unknown Callers," which allow you to block calls from numbers not saved in your contacts. On most smartphones, you can also block individual numbers after receiving a call from them by selecting the option in the call log. Additionally, consider using third-party apps that specialize in call blocking for more advanced features.
To avoid unnecessary calls from telemarketers, register your number in the "do not call registry list" and to avoid the unnecessary calls from unknown numbers use call barring system and block those numbers.