This is the Washington DC offices of Congressman Doug Collins, Ga. who was calling. It is the general call out number for members of Congress or their representatives, it is not a call back number for a specific Congressmen.
Same here...non working number for us house of reps. G3B. It's a woman's voice on the recording. I called our PA congressman recently so perhaps that's the reason.
I just received a message from this phone number. It was Nick Bruce from Congressman Brian Higgins office. He left a real number to call him back. He was responding to an email that I sent regarding the STANDUP ACT.