they would not identify themselves - said it was a personal matter and they said i had to tell them who i was first.  haha -- i'd think you'd know who you were calling.

Obnoxious f****rs call any number they get ahold of. Thank God for Google Voice - made it super easy to just block them completely.

Called and said nothing and then hung up/.

Phone rings, answer it, nothing on other end.

This phone number belongs to a debt collection company located In Sioux falls, sd.

Called saying it was a personal business matter and asked for my birthdate and mailing address.  I wouldn't disclose either and they said they'd call back at another time.  Wouldn't tell me why they were calling.  Very sketchy.