I get this one once a week.  I live in 423.  I think these are from the  "who called me - search for U" type companies that want you to pay for their search because you get annoyed by the same number enough.  They want more personal information than the scammers.  Go figure?  If I wasn't a busy person, I would consider moonlighting for a telemarketing company and destroy their call list database from the inside?