Southwestern Bell [SEP] parent company
Southwestern Bell
Southwestern Bell Telephone Company is a wholly owned subsidiary of AT&T. It does business as other d/b/a names in its operating region, which includes Arkansas, Kansas, Missouri, Oklahoma, Texas, and portions of Illinois.
The company is currently headquartered in Dallas, Texas at One AT&T Plaza.
History.
Southwestern Bell Telephone traces its roots to The Missouri and Kansas Telephone Company, which was founded in 1882. It was consolidated under the management of a single management unit of the Bell
Southwestern Bell Mobile Systems
Southwestern Bell Mobile Systems, Inc. was a wireless telephone company. It was created in 1984 as a split-off of Advanced Mobile Phone Service, the original wireless subsidiary of the Bell System. It was a division of Southwestern Bell Corporation.
It continued to operate as Southwestern Bell Mobile Systems until 2000, when SBC Communications and BellSouth combined their wireless operations into a single company, Cingular Wireless. Southwestern Bell Mobile Systems' assets were then transferred to a Cingular as a limited liability company named Cingular