Get Original Address from CTI Call Forwarding

How to retrieve the original address when I have a series of CTI ports chained together for call forwarding?

Example:

CTI x (Line 1 - "111")

Forward Unregistered Internal set to "222"

CTI y (Line 1 - "222")

Forward Unregistered Internal set to "333"

CTI z (Line 1 - "333")

CTI x and CTI y are unregistered.  CTI z is registered.  User dials "111".  CTI x forwards call to CTI y which forwards to CTI z.  CTI z processes the call. 

Is there a way to retrieve the original address ("111") here?

The answer is,

Use call.getCalledAddress().getName() should return the original called party in this scenario.