Caller ID read only "Texas."  I answered, and the person asked for me by complete name.  When I asked, "Who is calling, please?", the caller answered only "Denise."  When I asked "Denise WHO?" the caller became insistant on getting thru to the person she was calling.  When I asked, "What is the nature of this call?", the called hung up.  I caller ID'd the number; it belongs to Resolve Collection Corp.