I answered because I know someone with that area code, and they claimed that I was late on my Discover account which was totally wrong. They also asked for my account number and work phone #, which collection agents don't do (or at least aren't supposed to) if they are calling you. DO NOT PICK UP. If you pick up, do not give them any information. If you feel that your account is compromised in any way, contact your card customer service immediately and talk to their fraud detection department.
I have been getting calls from this number and no one is ever there. They left a message on my cell phone, but all it was, was a beep followed by a long pause of silence then they hung up. If it were Discover, my account is current, and if they really wanted money I would think they would leave a message or at least talk to me when i pick up. I hate being interupted thinking i have an important phone call and come to realize its all BS.
So i just got another call from this number and decided to answer. I said hello about 5 times and finally a nice English speaking woman came on the phone and apologized for all the phone calls i told her i had been receiving. Long story short she was calling to say that my automated payments had ended and my account was past due. They waived the fee and reinstated my payments. I'm glad they got ahold of me, so i think its worth giving them a try when you answer the phone and at first it may seem like no one is there.