Update...it is a company called NetProWa when you call (not fax) the number back it gives you a recording that if you are receiving unwanted fax calls, leave your number and they will remove them in 48 hours from their database and all of their clients databases. I did so. We will see if it works as they say.
We were awoke by a call from NetProWa at about 4:30 AM and it was not appreciated. This is not the first call from them. The number was 720-606-7094. When I called their number a message said I would have to call back to stop further fax calls as messages was full. Guess they have been pretty busy irritating others.
Had a call from this number and on the answering machine was just a constant BEEP BEEP. I presume it was the same fax machine trying to call. It read Net Pro Wa.