These jokers can spoof your caller ID. They can make it display any number, functional or not. If they wanted to they could send 123-456-7890.
If you don't know the number. Let voicemail catch it. You can always call back if the call is/was legit..
I did get a call from here. It was one of the deals that they would not tell you how but because of some website I signed up for I get a 100 dollar gift certificate. I often listen to the sales pitch but this guy was actually rude and not about to be talked to rudely when someone is trying to con me :-)
Called my cell, rang once and hung up. Says AL, USA. Probably a scam. I wouldn't waste my time and call them back.
Just report them on the Do Not Call website.
I received a call from this number and of course, I did not recognize it so I did not answer it. They left no voice mail which leads me to believe it is a scam or a solicitor.