when someone call you with block number , how to find out what number they calling from?

Answer 1

I dont think u can

Answer 2

You cant...if you have call control, it allows you to block unwanted, unknown name and number calls. The caller will receive a voice message that you are not accepting blocked calls and it gives them the option of punching in the number they're calling from. Trouble is, they can punch in a number which isn't the one they're calling from, but if that's the case, then an asterick * will appear in the call display to let you know that it's not the real number. This service is available for Bell customers in Canada, not sure about the States if that's where you are. Another option, if these calls are annoying or threatening in any way, you can dial *57 which is called Call Trace and the last number that called you can be traced by the police. Once this happens, the police will be able to get the information, contact you and you then have the option of charging the caller with harassment. Hope this helps...L

Answer 3

you can't unless they are harassing you and then you can report it to the police, who in turn and call the phone company and request that number, so you can find out who it is. Also if you have caller ID, you can have a service put on your phone, so that blocked numbers can't get through unless the caller dials a specific number first to unblock their number.