How do i find a number of a person who called me if i had to flash over

Question

Can I

I have a caller ID

and the call went through

Answer 1

Your looking for a feature called callwaiting-callerID.

Usually if you already have callerID from the phone company and you have call waiting, you probably have callwaiting-callerID, but you might want to call them and check.

The bigger issue here is that not all phones or callerID boxes support it.  It may just be that your phone doesn't support it.  Only more recent phones seem to have good support for this.

Its hard to know if it does or not without knowing the model of phone that you have.