Just calls then hangs up.

Just received a call from this number, no one the other end and then a hang up after about 5 seconds or so.

Left message re lowing credit card interest. It is part of a Multi group telemarketing system. All phone numbers are computer connected and the only way to catch them is answer when they call go along with the sales pitch until you get the company name. Give them fictiscious info to play along with them. Once you have company info you can pass it along to federal do not call authorities.