To view the details of your calls go to the left-hand side of your Dashboard screen and hit Voice → Calling Overview.
You can choose between several tabs which makes it easy to see exactly the call details you are looking for. 'All Calls' is an overview of all calls including the date, caller and callee number, status, time and cost. 'Recordings' and 'Transcriptions' is where you can find all calls which you recorded or transcribed via Flow Builder or API. 'Logs' is a list of all call logs for detailed info on call data.
If you have any questions about call details, errors or voice calls in general just contact us at firstname.lastname@example.org and we'll be happy to help you out.