Called and didn't leave a message. Did a reverse phone look up on whitepages.com and it was reported that this number is a suspected spam. Caller ID shows up as, "Unavailable".
This number called my cell phone yesterday. This is new because I get these type of calls on my landline all the time, but never on my cell, so I'm completely invaded now. [***]. I called the number this morning: "The survey you are calling about has ended." So thankfully itt was a one-time annoyance.