Rang on our phone, nothing but silence on the machine which automatically cuts it off after 30 seconds (so no message is left then). Not sure what they want but must not be important if they can't leave a message!
Called with a free intro offer for home security (we already have an alarm system). This follows some unanswered calls from this number where no message was left. Sounds like a scam. They wanted credit card info for this "free" offer. We blocked the number from calling again.