Related Clues:

• Formal reply to 'Who's there?'
• Self-identifying response
• "Who's there?" response
• Formal declaration
• 'Don't you recognize this voice?!'
• Formal response to 'Who's there?'
• Knocker's reply, perhaps
• Grammatically incorrect answer to ''Who's there?''
• Phone ID of a sort
• Formal response to "Who's there?"
• ''Hello ___'' (Rundgren tune)
• Answer at a door
• 'Hey, don't you recognize this voice?!'
• Informal response to ''Who's there?''
• Answer to ''Who's there?''