This number came up on my cell phone while I was on another call, so I looked it up here. Because the location was in Pennsylvania I thought it might have something to do with a bill dispute that was being investigated, but when I did a call back, someone answered thanking me for calling to claim my reward voucher, and what is my first and last name, please ---- to which I said "How did you get my number?". She (the person on the other end) never gave me a chance to say anything else, but quickly replied "Well have a nice day" or something like that and hung up. Sounds like they were "phishing" for information.
I ignored the call because I didn't recognize the phone number. I waited to see if the caller would leave a voicemail, but they did not. I called the phone number back and an automated greeting informed me that I qualify for a $100 shopping voucher. There's an option to be removed from their call list by pressing 2.