Received a call from 720-799-0728 --I was out of the house for about 10 minutes so this call went to my answering machine. This call was from a fax machine and it just made a horrible beeping noise. CALLER ID says: VIA FAX... I blocked them now because they might call back to try to annoy me.
Just got the same call. Ignored the first since I don't know anyone in Colorado and they called again 3 minutes later. Annoying and will be blocked as soon as I finish this.