Number is being used as the call back number for a theft ring. This number will appear on your bank statement with various company names associated with it such as "It was fun" and "Facebook" but the number always rings busy when trying to contact them to dispute charges.
This number is owned by Level 3 Communications and is a Landline in Palo Alto, CA. Level 3 Communications refuses to acknowledge the fraud or shut the phone number down nor will they provide law enforcement any cooperation in tracking down the fraud. This makes them accomplices to the theft.
Checked with my bank after viewing two unauthorized transactions (under $50 total) on my account to Facebook (haven't been on Facebook in 5 years). The transactions had not gone through. My bank said there was another transaction for over $200 they were watching that did not go through. Called the number associated with the charges and got a recording that the number was not in service. Called my bank back and immediately cancelled my card.
I did not receive a call from this number, but this is the contact number listed for a fraudulent charge/transaction against one of my credit cards. When I actually called this phone number, I got a garbled message saying: "This number is not in use." I'm making this comment just as an FYI.