This number, and a string of other 940 and 817 numbers, has called us multiple times.  No fax (though, sounds like a fax tone), no one on the phone, no way to look them up or ask them to stop calling.  Filing a Junk Fax 1088 Form with the FCC, recommend you do so as well.

https://esupport.fcc.gov/form1088/consumer.do?form_page=1088A