Has called twice, first at 10 pm, today at 1:30. Hangs up in vm. When I call back it beeps then sounds like fax line. Frustrating. Can't find any info on Google or white pages other than it's a landline in Irving, TX, but that might not even be right. Unfortunate I was unavailable the two times they called- Wish they would call again so I could answer and find out. Very irritating. If you know please post.