I manage SEO for several clients, and noticed this number. This number is a company called Authentify. They do Out-Of-Band Authentication. I beleive Authentify placed the calls to my numbers for Yelp, but it may be a different web listing company.
I received a call from this number on my wireless telephone at 2:05 PM on Tuesday, 16 June 2009. It was a robotic female voice repeating the same message: "IF YOU ARE EXPECTING A CALL FROM FIFTH THIRD BANK, PRESS THE POUND KEY IF YOU ARE EXPECTING A CALL FROM FIFTH THIRD BANK, PRESS THE POUND KEY IF ... ", etc. I briefly considered pressing the "#" key, and hearing someone from Uzbekistan asking for my bank account number, passwords, and Social Security Number, then informing me that her husband had known my dad back in Damascus, Syria. (My parents really were from Damascus, Syria!) But then I thought, why do that for momentary amusement when this creep, while I was laughing, was draining my Contact List and other data from my telephone?
I hung up and reported the matter to a branch of Fifth Third Bank.