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Ramesh KallooriRamesh Kalloori 

How to get the custom field history with old value,new value and modified by ?

Sonam_SFDCSonam_SFDC
This data is captured if you activate the history tracking for that field :

Go to Setup > Customize under Build > open Object where the custom field is > fields >Click on the button "Set History tracking"
and add the History tracking related list to the object page through the page layout.