??? How to trace a fax machine number ???

[AAP]

I know there are programs on the net that you can type in a phone number and find out who it belongs to... but is there one that traces fax numbers? the reason I ask is that I keep getting a blank fax with nothing but the fax number and time at the top of the page. This happens about 12-15 times per day.

If I get the company, I can call and complain.