| Weird Phone extension???
The DN is assigned to an ACD. ACD groups do not have TNs - only their members do.
Since you say this number has a VM box attached to it someone used an ACD entry to create a phantom mailbox - an extension that has VM without an associated TN.
Print out the ACD info on this ACDN and I bet the NCFW prompt will have your VM pilot number.
LD 23
PRT
ACD |