EXHIBIT 12.1 CROWN CASTLE INTERNATIONAL CORP. COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES AND EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS (DOLLARS IN THOUSANDS) THREE MONTHS ENDED MARCH 31, ------------------------- 2002 2003 ------ ------ Computation of Earnings: Income (loss) before income taxes, minority interests and cumulative effect of change in accounting principle....................... $(102,432) $(62,458) Add: Fixed charges (as computed below)............ 84,328 84,644 --------- -------- $ (18,104) $ 22,186 ========= ======== Computation of Fixed Charges and Combined Fixed Charges and Preferred Stock Dividends: Interest expense............................... $ 52,065 $ 55,150 Amortization of deferred financing costs and discounts on long-term debt................... 24,254 17,488 Interest component of operating lease expense.. 8,009 12,006 --------- -------- Fixed charges................................ 84,328 84,644 Preferred stock dividends...................... 20,105 14,371 --------- -------- Combined fixed charges and preferred stock dividends............................. $ 104,433 $ 99,015 ========= ======== Ratio of Earnings to Fixed Charges............... -- -- ========= ======== Deficiency of Earnings to Cover Fixed Charges.... $ 102,432 $ 62,458 ========= ======== Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends....................... -- -- ========= ======== Deficiency of Earnings to Cover Combined Fixed Charges and Preferred Stock Dividends........... $ 122,537 $ 76,829 ========= ========