AT&T stands for American Telephone and Telegraph.

Short answer

  • The initials AT &T are an abbreviation of the company’s original full name: American Telephone and Telegraph Company.
  • Today the company is officially called AT &T Inc., but the letters still reflect that historical name.

Mini background

  • AT&T began as a long‑distance telephone company linked to Alexander Graham Bell’s early telephone business in the late 19th century.
  • Over time it grew into a huge U.S. telecom monopoly often nicknamed “Ma Bell” , before being broken up and later restructured into the modern AT&T Inc.

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