I received yet ANOTHER call from this number.  NO MESSAGE....AGAIN!!! Why don't they say who they are?

I just got a call from this number. I sent to vmail - no message was left. 1st time I have seen this number

No mess. left.

I received a call from this number today at 8:49AM PST.  I did not answer and I let the call go to voice mail, but no message was left.

Obviously a New York City phone number, but I don't know any New Yorker's with NYC area codes and this phone number belongs to a land line, not a cellular phone.

I attempted to call the number back, even though it's 2:00AM tomorrow over there.  It did not ring, but went straight to voice mail where instead of a organically recorded message, number, or name, I was told to leave a message for "Mailbox Four One Two."

Of the free research I've done online, the number belongs to MCI WorldCom and it's supposed to be a residential number, but considering MCI does lots of business accounts and the number is unlisted, I'm going to guess that it's some kind of creditor, but that doesn't explain why they'd be calling me.