I too got a night call (1 am) from the same number.
On the web on found that number to be the fax number of
https://www.doximity.com/cv/sarah-olson-slash-1
Brian Leslie
115 E. 3rd Ave
Suite 115
San Mateo, CA 94403
Phone: (650) 200-3901
Fax: (650) 403-1817
Calling the phone number got me a recording with a menu.
There are several names associated with this source: "global fax" "doximity" sarah-olson and Brian Leslie.
The caller, 650-403-1817, FAX Global, tried to facsimile us @14:11 again for the 2nd time. Many people filed reports about this number to www.800notes.com. & www.donotcall.gov. since 04/25/2013. I tried to returned the call, again it is fax machine making noises over the phone. My previous complaint as:The caller tried to fax us again @10:38, 05/10/2013, 05/10/2013.. My wife hung it up. It always tries to fax 2 or 3 more times/day. I returned the call & it is a fax phone machine.
Fax Global:Address
1925 Trumbauersville Rd Lot 6
Quakertown, New Jersey 18951-2090
Phone (267) 373- 3914.
I will file the complaints with: www.fcc.gov. which can fine them $100,000.00 to $200,000.00
Number 650-403-1817,
Please stop trying to fax us on our phone line. Your calls come at any time, including early morning and late at night, and repeat up to 7 times in a 24 hour period. I will try to find your business contact information and locale, and begin legal proceedings against you. This is harassment!