This is the state department building in arlington va. chances are you know someone who works there. i recieved a call from there with no voicemail, and through an investigation i found out that it was the state department building.
It is the switchboard number for the United States Department of State building in Arlington, Virginia. All numbers from State building calls use that number. Audix is the voice messaging system they use, but you can only reach a person if you have their extension number.