The point of a 69 call is to block the number that is making the call. There is no way to find out this number.
Calls that show as private number on Caller ID withholds their name and number from the service. On landline phones you usually can call back the last person who called your number by using star 69. This will often not work on private numbers, unknown caller, or blocked numbers leaving you with no way to call them back.
In the US, it is *69 on a land line phone.
If the number is private then you cannot retrieve it. However, if you wish to call that number back (and it is the last call you received) you can dial *69.
*69
If you get a busy signal when you dial *69 to call back the last person that called you, it means either that the number is busy or that your telephone company is unable to determine the last number that called you.
Dialling 69 on its own will normally be ignored by a phone as it is too short to be a normal phone number. However, *69 is often used for call return - the service that tells you the number of the last person to call you.
Star 69 it to play back recent telephone calls.
You can contact the spoofed number back by dialing star-69 on your phone. Unfortunately there is no way to prevent others from spoofing your number to call other people.
You have to block your number from showing up on their caller ID. You can call the phone company and request this feature for every call you make. For specific calls in the US, you can use the dial code *67 before dialing the phone number. Using either of these, your call will show up as Unknown name with the number or Unknown name - unknown number. Chances are though, with the latter, they may be able to check who called by dialing *69 and having the phone company read off the last call-in number.Provided that the called party has a caller ID service enabled. Even if the call is forwared using a call forwarding service it will show the number but unless if you press *67.
To get the number, try pressing star-69. Unless the number is restricted, your return call service should give you the number of the last phone to call yours. In UK the number is 1471.
21, 23, 25. Reasoning: Call the unknown middle member of the three consecutive integers m. Then m - 2 + m + m+2 =69; 3m = 69; m = 23.