Southwestern Bell Yellow Pages, nicknamed "SWBYP'S" , was formed in 1984 upon the breakup of AT&T. SWBYP'S also referred to the following publishing/advertising companies of Southwestern Bell Corp./SBC Communications:

• Southwestern Bell Advertising Group, Inc. - Advertising division of Southwestern Bell Corp.
  • Southwestern Bell Yellow Pages, Inc.
  • Southwestern Bell Advertising, L.P. - assembled ads, listings for telephone books
  • Worldwide Directory Products Sales, Inc. - Distributors of telephone books

In 1995, Southwestern Bell Corp. changed its name to SBC Communications, and SWBYP'S was largely unaffected. In 1999, SBC completed its acquisition of Pacific Telesis

Pacific Telesis

Pacific Telesis Group was one of the seven Regional Bell Operating Companies, sometimes also referred to as "RBOCs" or "Baby Bells", created in 1983 in preparation of the breakup of AT&T as a holding company for Pacific Bell and Nevada Bell, Pacific Telesis International and several other...

, Ameritech

Ameritech

AT&T Teleholdings, Inc., formerly known as Ameritech Corporation , was a U.S. telecommunications company that arose out of the 1984 AT&T divestiture. Ameritech was one of the seven Regional Bell Operating Companies that was created following the breakup of the Bell System...

, and SNET

SNET

The Southern New England Telephone Company is a local exchange carrier owned by AT&T. It started operations on January 27, 1878 as the District Telephone Company of New Haven. It was the founder of the first telephone exchange, as well as the world's first telephone book...

, and added "SBC" branding to its companies. The SWBYP'S nickname went by the wayside, in favor of Southwestern Bell Yellow Pages. The last year SWBYP'S were branded Southwestern Bell came in 2001, when "SBC" was added to the company names SBC owned, and SWBYP'S became known as SBC Southwestern Bell Yellow Pages.