This number is the Online Yellowpages who will attempt to tell you that you owe them for ads from previous year's listings which you did not agree to and then threaten you with being turned-over to a collection agency.

It's a SCAM

Do NOT answer or tell them anything if you do.

Called and with minimal information about our business (owners name, mailing address).  Said they are online yellow pages and they were turning us over to collections for $470 past due bill and cancelling our account "per our notice" and putting us on a do not call list.  Person who answered the phone asked caller to hold on while he transferred to caller to the bookkeeper.  Caller hung up.

SCAM.