RBOC (Regional Bell Operating Company)
When ATT was broken up into 7 separate companies, each of the new geographically limited companies was referred to as a: Regional Bell Operatiing Company or RBOC.
The seven RBOCs were:
- Ameritech
- Illinois
- Indiana
- Michigan
- Ohio
- Wisconsin
- Bell Atlantic
- Maryland
- Virginia
- West Virginia
- Washington D.C.
- Bell South
- North Carolina
- South Carolina
- Georgia
- Florida
- Alabama
- Louisiana
- Mississippi
- Tennessee
- Kentucky
- NYNEX
- New York
- Maine
- Massachusetts
- New Hampshire
- Vermont
- Rhode Island
- Pacific Telesis Group
- California
- Nevada
- Southwestern Bell
- Texas
- Oklahoma
- Kansas
- Missouri
- Arkansas
- US WEST
- Washington
- Oregon
- Montana
- North Dakota
- South Dakota
- Minnesota
- Idaho
- Iowa
- Wyoming
- Nevada
- Nebraska
- Utah
- Colorado
- Arizona
- New Mexico
These 7 companies have morphed into 4:
- SBC
- Bell South
- Verizon
- Quest
Now the term ILEC is often used to refer to these companies.