I called this number back (did not answer call). All it said was "YP". Is that yellow pages or one of those phony yellow pages? Either way, I don't need to talk to them!
I got a call too - same number, no message. It sounded like a call center in the background. I opened a free online yellow pages listing for my business last month and have received a couple of marketing calls since then trying to get me to "upgrade." I suspect that this was more of the same. So unprofessional not to leave a message!
It's the yellow pages (real YP.com, he said) and they did leave a message for me. I've talked to them before, and I don't think they're a scam. But their service is relatively expensive for me as a new small business, and I wish they would stop calling.
They called me and did not leave a message either, I called back after hours and the recording said YP as well. What triggers this call is when you fill out Yellow Pages directory online, for me it was when I was doing my SEO through go daddy.