This number called and never left a message.

This number called my cell phone, which is an unlisted business number (company phone) - I was in the middle of a conference call on my land line and had to silence it.  No message was left.

Same here. Called but didn't leave a message. I've been receiving several such calls every week. Out-of-state unknown numbers leaving no messages. After googling the numbers, they all turned out to be from a company called 'Card Services.'

Yes, they keep calling with numbers that are not in service.  This is a service that advertises itself as CARDSERVICES.  Depending on the amount of time you are ABLE to spend on the phone with them before they hang up, they want to know your current credit card balances, average interest rate and then what cards you have the balances on.  When you ask for their call back number they instantly disconnect, when you ask them to wait a second they instantly disconnect. If you ask for them to take you off their call list, they will also instantly disconnect. I think I am going to start using a police whistle on them first. Does anyone know if that is illegal?

got a call (about my 5th so far). Called back and after several rigs, it comes back and sez the number is no longer in service.