Came up on caller ID but did not answer

Have been receiving multiple calls a day from 914-290-6339 and now calls are getting earlier in the morning.  With family here ill, it's hard to keep the calls from waking up or disturbing the sick.  I'm about to pull the phone out of the bedroom(s) to facilitate recovery for these people.  Since we are on a do not call program, how do they get away from making calls like this?

have called about every day during the past month - no message left ever.

Called twice..left no message. Called it back and it said it was the March of Dimes and they would call back. If you don't want them to call you..wait and press one. They tell you it will take 30 days for it ti work!

A friend received a blank call from this number, checked her Caller ID and called back.  She got some woman she couldn't understand.  The next day some man called from the same number saying, "I'm interested in babies".  My friend told him not to call again.  I tried to track down the number and, having no luck with reverse lookup, I googled the number and found the complaints on your website. Has anyone called the legitimate number for the March of Dimes to complain?  The nature of the blank calls and the man's strange comment to my friend makes me think it's not the March of Dimes, but a "phishing" scam.