These calls are anoying. They are coming in at all hours of the day, sometimes within 2 minutes of each other right through 9 PM.  
Thanks to caller ID we do not answer any calls that state unknown name or unknown number.
If their calls are legitimate they should leave a message and if interested we would return call.

Annoying calls. Thankful I have caller ID.

Don't know the company or the reason for the calls

Called early in the morning...claimed to be from March Of Dimes.....didn't pay much attention to what woman had to say, but did ask if I could help....I said no and hung up.

4calls with no message. If caller is Donor Care Center, March of Dimes as reported, try opting out with the following link
http://www.marchofdimes.com/aboutus/17879.asp. YMMV