Qwest Corporation
Pacific Bell
US West
Bell System
Nevada Bell
AT&T Corporation
Lumen Technologies
Qwest
Southwestern Bell
Pacific Telesis
Michigan Bell
Ameritech
Frontier Communications ILEC Holdings
Verizon New Jersey
Illinois Bell
Former division of AT&T Corporation and then US West
Pacific Northwest Bell Telephone Company was an AT&T majority-owned Bell System company that provided local telecommunications services in Oregon, Washington, and northern Idaho. Wikipedia