Just got a call from this number. Asked for some random name and when I told them they had a wrong number, they apologized and then said that the call was being "monitored and recorded"...sounds kind of suspicious to me. Do not answer, they will only waste your time.
This is General Revenue Collection Agency for student loans. If your number was every on a student loan application that failed to pay, they will call non stop even if you just got the number. They change their 513 number every few months.
If you are getting calls from the a*holes just block their calls. They are not going to stop if you tell them they have the wrong number, send them them a certified letter, report them to do not call list or report them to your attorney general.
If you have a home phone all you need to do is get a phone with caller id block. Uniden and Panasonic make them now. The uniden I have does not even ring once, just blocks their calls. If they call on your cell and you do not have caller id block, just save them as a contact and set their ringtone to no ring.