When were the dravidians alive?

Dravidian has been confirmed as a farming language and the first agricultural Neolithic complexes appeared in the northwest part of the Subcontinent. Proto Dravidian is probably connected with the Early Harappan phase of the IVC of 3300-2600 BC. By 2500 BC the Dravidian speakers had already reached South India and developed the Southern Neolithic complex. Dialects arose from 2700 BC according to the latest research.