Hey folks -
This one is one of the more difficult items to pull and report on. Today, the only way to do this, is to pull all interactions from the conversationDetails API. Parse through all the sessions from all the conversations. Then interrogate those sessions that end with an exitType of Transfer. From there, you'll need to look at the next session of that conversation, to see where the session is actually going.
From there, there is a "sessionDNIS" that will provide the actual DNIS of that particular session. This is particularly useful for external transfers, as the sessionDNIS of hte transfer will be the external number transfer target. And that would obviously be different from the initial DNIS from the caller.
At any rate, this is do able. And I promise I'm not a sales person, but this is one of the use cases that is covered by our Insights offering, with an OOB Power BI report:

So, definitely doable. But today, this is a pretty heavy custom lift. I've also had an Idea out there to get something like this in the OOB UI. Feel free to go vote on it!!
https://genesyscloud.ideas.aha.io/ideas/ANLS-I-1366
------------------------------
Trent Vance
TTEC Digital, LLC fka Avtex Solutions, LLC
------------------------------