I do not answer, and they don't leave a message. This attempt at not leaving messages, etc, seems to be very ghetto. Not what I expected from the Philharmonic.

Received four separate calls over the last few weeks.  Nothing at other end.

They are definitely legit (I work for a NYC based orchestra,) its the NY Phil's phone donation callbank.  They are very persistent, but they are also good about making sure you are off their call-list if you tell them to take you off.  Unfortunately, no one will pick up if you call back, from what I can tell.  Here is the program information:
Friends of the Philharmonic
Avery Fisher Hall
10 Lincoln Center Plaza
New York, NY 10023-6970
Telephone: (212) 875-5381
Fax: (212) 875-5716
E-mail: friends@nyphil.org

When I answered the call the lady said she was calling from the "Friends and Patrons of the NY Philharmonic".  I did once buy tickets to the Philharmonic, so perhaps it is legit.  I asked to be removed from the call list.  The lady said, "oh, ok.  Oh!  Mr. <my last name>?" and then hung up / got disconnected.

this number calls me at least 3 times a week!  I never answer...and they never leave a message.  So weird!

This is the number from *69,  I did not answer and they hung up rather than leave a message.  I did a reverse phone look up under people at www.infospace.com
There is no free info re this phone number.  However, the service that charges $4.99 claims it has a name and address for this person.  [I did not pay it-- they only called me once so far]

When I answered the phone with my first and lastname I got diconnected immedialty! I didn't call back!

Asked for me by my last name, then we were disconnected.  When I called the number, it sounded like someone picked up but didn't say anything.