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Click on the year below to view the updated map on the timeline.
   
 
1984
AT&T divests its local operations in seven Regional Bell Operating Companies
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1995
San Antonio-based Southwestern Bell changes its name to SBC.
 
1997
Philadelphia-based Bell Atlantic acquires New York-based NYNEX and moves its headquarters to New York. SBC acquires San Francisco-based Pacific Telesis. LDDS WorldCom acquires MCI.
 
1998
SBC acquires New Haven-based Southern New England Telephone (SNET).
 
1999
SBC acquires Chicago-based RBOC Ameritech.
 
2000
Bell Atlantic acquires GTE to form Verizon and Denver-based Qwest acquires Denver-based RBOC USWest. MCI WorldComm shortens its name to WorldCom.
 
2001
SBC and Atlanta-based BellSouth divest their wireless units to form a joint venture, Cingular Wireless.
 
2003
Amidst an accounting scandal and bankruptcy, WorldCom changes its name back to MCI.
 
2005
Verizon acquires the troubled MCI and SBC acquires the financially weakened AT&T, taking on the AT&T brand. Sprint and Nextel merge.
 
2006
BellSouth is acquired by AT&T (pending regulatory approval).