EXHIBIT 12 PACIFIC BELL AND SUBSIDIARIES COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES Dollars in Millions THREE MONTHS ENDED MARCH 31, YEAR ENDED DECEMBER 31, ----------------------- ---------------------------------------------------------- 1998 1997 1997 1996 1995 1994 1993 --------------------- ---------------------------------------------------------- Income Before Income Taxes, Extraordinary Loss and Cumulative Effect of Accounting Changes $ 413 $ 466 $ 34 $ 1,567 $ 1,161 $ 1,276 $ (54) Add:Interest Expense 106 102 460 379 420 437 429 1/3 Rental Expense 9 10 41 47 29 22 23 --------- --------- -------- --------- ---------- ---------- ----------- Adjusted Earnings $ 528 $ 578 $ 535 $ 1,993 $ 1,610 $ 1,735 $ 398 ========= ========= ======== ========= ========== ========== =========== Total Interest Charges $ 115 $ 112 $ 497 $ 412 $ 420 $ 437 $ 429 1/3 Rental Expense 9 10 41 47 29 22 23 --------- --------- -------- --------- ---------- ---------- ----------- Adjusted Fixed Charges $ 124 $ 122 $ 538 $ 459 $ 449 $ 459 $ 452 ========= ========= ======== ========= ========== ========== =========== Ratio of Earnings to Fixed Charges 4.26 4.74 0.99* 4.34 3.59 3.78 0.88** <FN> * As defined within the computation of earnings to fixed charges, earnings are $3 less than fixed charges for 1997. See Management's Discussion and Analysis of Results of Operations in Pacific Bell's 1997 Annual Report on Form 10-K for a discussion of merger-related and other unusual items that reduced earnings for 1997. ** As defined within the computation of earnings to fixed charges, earnings are $54 less than fixed charges for 1993. See Management's Discussion and Analysis-Other Business Matters in Pacific Bell's 1997 Annual Report on Form 10-K for a discussion of the restructuring charge which reduced earnings for 1993. </FN>