A recording with a female voice was quickly telling me that they are doing a survey and it would only take 4 minutes. I hung up. Later on, I forgot that I already picked up earlier, so I called them back using automatic dialing from my caller id. I got the following message: "Sorry, the number is not in service. Check the number and call again."

I had a similar experience earlier in the day with 216-542-7018. I did not pick up that time, but when I called back, there was a message saying that I dialed the number that is not in service. They could be related.