In speaking with the representative, he 'Dinesh Joshi' indicates that is 'calling from Allied Interstate' which seems to be a collection agency
He would not provide a physical address on his call to a number on the federal 'do not call list'
A google search turns up: http://www.allied-interstate.com/
This website does not have any address information on it either
A further google search indicates they maintain (or formerly maintained) principal corporate offices at:
Allied Interstate, Inc.
3000 Corporate Exchange Drive
Columbus OH 43231
In looking through the prior reports, it appears that this number may be being used as the displayed caller ID for multiple entities as well, which is a technique used got firms selling telemarketing services, usually delivered through the new VOIP technologies. But using a common caller ID for multiple, it pollutes the 'reputation' of a number, and so makes calls harder to screen on an automated basis