Phone calls from these numbers started calling me Thursday April 8, 2010 and they call about every other day. I called one of them back and the voice mail stated I had reached Blackstone Marketing Group, I researched them and also got the company name DataPrompt International, both companies are based out of Chicago, IL. I left a message that I do NOT want them to continue to call me because of course no one answered and they continue to call me. (312)000-0000   (312)423-4025   (312)423-4101  (312)423-4100

I started receiving these calls today, and so far I have gotten three calls in about four hours. I picked up and they never say anything. It's annoying!

multiple calls per day - no message

Started 11-01-10 -- in less than eight hours, received 11 calls from this number.  Four of the calls occurred within 32 minutes.  Have not answered any calls.  Wish they'd permanently stop.

Received 4 calls in the last week. Don't leave messages.