EXHIBIT 12 PACIFIC BELL COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES Dollars in Millions THREE MONTHS ENDED MARCH 31, YEAR ENDED DECEMBER 31, ------------------------------------------------------------------------- 1997 1996 1996 1995 1994 1993* 1992 ------------------------------------------------------------------------- Income Before Income Taxes, $ 599 $ 520 $ 1,945 $ 1,538 $ 1,692 $ (39) $ 1,738 Extraordinary Loss and Cumulative Effect of Accounting Change Add:Interest Expense 98 88 363 410 439 429 460 1/3 Rental Expense 16 12 46 28 40 37 35 ------------------------------------------------------------------------- Adjusted Earnings $ 713 $ 620 $ 2,354 $ 1,976 $ 2,171 $ 427 $ 2,233 ------------------------------------------------------------------------- Total Interest Charges 115 98 $ $ 410 $ $ 429 $ 411 439 460 1/3 Rental Expense 16 12 46 28 40 37 35 ------------------------------------------------------------------------- Adjusted Fixed Charges $ $ 110 $ $ 438 $ $ 466 $ 131 457 479 495 ------------------------------------------------------------------------- Ratio of Earnings to Fixed Charges 5.44 5.64 5.15 4.51 4.53 0.92 4.51 ------------------------------------------------------------------------- <FN> * Results for 1993 reflect restructuring charges which totaled $924 after taxes. </FN>