Inbound DID accountcode

I currently run Trixbox 1.1.1. I have a DID and TFN that route to the same IVR. I am unable to differentiate which number was called from the CDRs. Obviously, I will charge my customers more for the inbound TFN. Is there a way to set an accountcode for an Inbound Route?

Even if I route an Inbound DID/TFN to a single extension, the destination field in CDRs is the extension being routed to.

ME

I also have a similar issue… Any ideas would be appreciated…

It is very useful to have accountcode for inbound DID.
I change own sources every time I update AMP.
But seems, this topic not so interesting for all.