When reviewing your company's call history, you may notice that transferred calls appear as two separate entries. This is especially common when a call is transferred to a number that is not publicly advertised.
When a call is transferred - whether to an external number or another Aircall number - the system treats the transfer as a new call, since it doesn't know the final destination of the call. As a result, the transfer will be logged as a separate call. Specifically, transfers to another Aircall number will show up as an inbound call, while transfers to an external number will be recorded as an outbound call.
If call recordings are enabled, this will also create two separate recordings: one for the original call (which includes the entire conversation) and another for the transferred leg of the call (which only records the transfer portion).