Star 67 is a code that allows you to block your caller ID and prevent your phone number from being displayed to the person you are calling. It works by adding *67 in front of the phone number you want to call. This feature has been around for many years and was commonly used to protect the privacy of the caller.

However, the effectiveness of star 67 in blocking caller ID depends on a number of factors. Firstly, it is important to note that star 67 does not provide complete anonymity. While it will block your caller ID from being displayed on the recipient’s phone, your call can still be traced by law enforcement agencies or by your phone carrier if they are subpoenaed.
In addition, some people have opted to use apps or services that automatically reject calls from blocked or private numbers. In these cases, even if you use star 67 to block your caller ID, your call may still be rejected by the recipient’s phone.
Another factor that can impact the effectiveness of star 67 is the type of phone being used. While star 67 generally works on most landline phones and older cellphones, some newer smartphones have features that can override it. For example, iPhones have a setting called “Silence Unknown Callers” that will automatically send calls from unknown numbers to voicemail, even if star 67 is used.
Furthermore, it is worth noting that some businesses or government agencies may require that you do not block your caller ID when calling them. In these cases, using star 67 may result in your call being rejected or not being answered.
In conclusion, star 67 can still work in some cases to block your caller ID and protect your privacy. However, its effectiveness can be impacted by various factors such as the type of phone being used and the recipient’s call blocking settings. It is important to understand that star 67 does not provide complete anonymity and that your call can still be traced by certain authorities or by your phone carrier if necessary.