I too have been receiving calls from the same Indian guy.  Sometimes the company name is "Maryland Cleaning Services" other times just "Cleaning Services".  I also noticed a change in their phone number.  On the first call (the same Indian guy) claimed they had cleaned by ducts in the past.  I told him I have never used their services and I am not interested.  Two weeks late I got another call and this time I told him to take my name off their list.  Needless to say that was fruitless as I am still continuing to receive calls from them.  I'm blocking this number for now, but I'm sure they'll start calling from another new number in a few months.

They call several times a day and when I answer they say nothing.  I am on the do not call list -- not working too well!

1) Bogus operations do not follow the law.
2) Overseas operations are exempt from the dncr.

I get calls from all sorts of numbers from them, too--it used to be around noon, but now they've graduated to calling late in the evening as well!

Either a bad cleaning service or outright scam. They call incessantly to the point of harassment. One time I picked up to tell them, in no uncertain terms, to never call me again. Immediately after I hung up they called back and tried to tell me I'd won a contest. I didn't let them finish. Only thing to do is to report them again to the FCC and FTC with the newest phone number they are using.