Change Caller ID based on Dialed Number

Could you please help me in understanding how to implement this feature.

Question: Calling Number should appear different based on the dialed number,

How CURRI will fix this problem. DO I need a Database to maintain this info or it is stored in CURRI server itself?

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Answer: CURRI can do this. You would have to maintain a mapping of the dialed number to calling number that allows you to change the calling number of the call info. For performance reasons, you may want to cache results from a DB rather than querying a DB for every single call being processed.