This caller has calling me for a long time with the last couple digits of the phone number different. A blog comment of one of the other phone numbers told of a do not call request service at 866-246-7196. I spoke to a person there and she explained they provide this service to a small number of companies that call consumers who want to minimize complaints and save time not calling people who don't want to be called. She verified this phone number as on their list and added my receiving phone number to the do not call list. That was late last week and it worked to stop the calls.
I have been bombarded by calls from this number and its "sister numbers" with 440-617 as the first 6 numbers. i havefrequently reported to donotcall.gov to now avail.