The consoles themselves don't have an assigned DN exactly but they belong to a Departmental Listed Directory Number.
You could start by printing the LDN block in LD 21 which may show which consoles are assigned to specific LDN's.
Consoles have Attendant numbers (ANUM) but these can only be used to call between other consoles, not from phones.
The ANUM's can be assigned in the customer data LDN block to up to 4 different LDN's.
Anyway, print the LDN data to see what you have and go form there.
It's also possible there is Multi-tenant option on your switch but you don't want to get into that unless you have to.