Bell System - Subsidiaries

Subsidiaries

Before the 1984 break-up, the Bell System consisted of the following corporate structure:

• American Telephone and Telegraph Company, a holding company and long-distance carrier
  • Illinois Bell Telephone Company
  • Indiana Bell Telephone Company, Incorporated
  • Michigan Bell Telephone Company
  • New England Telephone and Telegraph Company
  • New Jersey Bell Telephone Company
  • New York Telephone Company
  • Northwestern Bell Telephone Company
  • Pacific Northwest Bell Telephone Company
  • South Central Bell Telephone Company
  • Southern Bell Telephone and Telegraph Company
  • Southwestern Bell Telephone Company
  • The Bell Telephone Company of Pennsylvania
  • The Chesapeake and Potomac Telephone Company
  • The Chesapeake and Potomac Telephone Company of Maryland
  • The Chesapeake and Potomac Telephone Company of West Virginia
  • The Chesapeake and Potomac Telephone Company of Virginia
  • The Diamond State Telephone Company
  • The Mountain States Telephone and Telegraph Company
    • Malheur Home Telephone Company
  • The Ohio Bell Telephone Company
  • The Pacific Telephone and Telegraph Company
    • Bell Telephone Company of Nevada
  • Wisconsin Telephone Company
• Other subsidiaries:
  • Western Electric Co., Inc. (equipment manufacturing)
    • Bell Telephone Laboratories, Inc. (R&D, co-owned between AT&T and Western Electric)
  • Cincinnati Bell, Inc. (22.7% owned)
  • The Southern New England Telephone Company (16.8% owned)
  • Bellcomm