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Bell System
Parent company
  • American Telephone and Telegraph Company
Local telephone companies still extant
Wholly owned
  • Bell Telephone Company of Nevada
  • The Bell Telephone Company of Pennsylvania
  • The Chesapeake & Potomac Telephone Company
  • The Chesapeake & Potomac Telephone Company of Maryland
  • The Chesapeake & Potomac Telephone Company of West Virginia
  • The Chesapeake & Potomac Telephone Company of Virginia
  • Diamond State Telephone
  • Illinois Bell
  • Indiana Bell
  • Michigan Bell
  • Mountain Bell
  • New England Telephone
  • New Jersey Bell
  • New York Telephone
  • Northwestern Bell
  • Ohio Bell
  • Pacific Northwest Bell
  • Pacific Telephone
  • South Central Bell
  • Southern Bell
  • Southwestern Bell
  • Wisconsin Telephone
Partially owned
  • Southern New England Telephone
  • Cincinnati Bell
Other subsidiaries
Manufacturing
  • Western Electric
Research
  • Bell Labs
Long distance
  • Long Lines
Wireless
  • Advanced Mobile Phone Service
Regional Bell companies
  • Bell Canada (1880-1975)
Historical
Commemorative
  • Alexander Graham Bell National Historic Site
  • Bell Boatyard
  • Bell Homestead National Historic Site
  • Bell Telephone Memorial
  • Telephone Pioneers of America
  • Spirit of Communication
Defunct
  • Bell Telephone Company
  • New England Telephone and Telegraph Company
  • International Bell Telephone Company
  • The Bell Telephone Company of Canada
  • Northern Electric
  • Bell Telephone Manufacturing Company
  • AT&T Technologies, Inc.
Related topics
  • Divestiture
  • Regional Bell Operating Company
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