They do not leave a message because this is a spoofed number that is only being used to verify if someone or an answering machine answers the call. Then the telemarketers know when you are home and likely to answer another call. I have been battling these crooks for 2 years. I started blocking all calls that I know are scams, but they continue to change the numbers and area codes, so I am up to 16 blocked numbers and adding about 1 every day. Some of these idiots call every 7 minutes to the blocked number for up to an hour+. The phone rings once and then is blocked. I got 10 calls today, every 7 minutes.
Yes, I have reported this. There are so many of these and they sell to one another so likely at least 3 of the calls I get are from different scams. The main one was from Microsoft INDIAN caller who actually knows Bill Gates! And one must be from the RNC because they identify themselves as DNC, and I know DNC would not be stupid enough to do this and ruin themselves! Yes, well the scammers must be making money or they would not be doing this. I actually think some of them may be phone terrorists, mapping our phone lines. Guess having this happen to you day after day makes you paranoid.
Don't Call list can do nothing to businesses that are not really business but scams and may not actually have people in the US doing this, but be off shore somewhere.
There are places on the Internet where you can buy Spoofing numbers and then you are in business using different numbers all the time. On the Internet from such providers as SpoofCard.com, CallerIDFaker.com, PhoneGangster.com, telespoof.com, and numerous others. They say there are legitimate for being able to use this type service, I say they are liars, and should be banned from the Internet.
I've been getting calls from this number for a few weeks, and they are increasing in frequency. I think they are from candidates running for election in November. Very annoying.