Missing data from call logs

hello, I have instances (approximately 10% of our calls) where the data in From Number/Name of an Outbound call is missing from a Call Log record. For reference, I'm pulling the data in a small database so that we can perform some advanced analytics on the call logs of the company. Missing From Numbers makes getting accurate data difficult. Is a way to collect this data from another API endpoint, or perhaps another attribute I'm missing that will identify the initiator of an outgoing call?