Related Clues:

• Self-identifying response
• "Who's there?" response
• 'Don't you recognize this voice?!'
• Entrance line
• Knocker's reply, perhaps
• Arriver's phrase
• Grammatically incorrect answer to ''Who's there?''
• Phone ID of a sort
• ''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?''
• ''Who's there?'' reply
• Words after "Open up"