A Number (disambiguation)

A Number is a 2002 English play by Caryl Churchill.

A Number may also refer to:

  • a number, mathematical object
  • A-Number, or calling party, the person who initiates a telephone call
  • A-Number, Alien Registration Number/Alien Number, A unique seven-, eight- or nine-digit number assigned to an alien by the United States Department of Homeland Security.
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