EXHIBIT 12

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)

	Years Ended December 31,
	2012			2011			2010			2009			2008
Computation of earnings:
Income (loss) before income taxes	$	100,827		$	179,807		$	(338,105	)	$	(190,523	)	$	(153,219	)
Add:
Fixed charges (as computed below)	727,472			620,871			600,295			551,288			458,477
Subtract:
Interest capitalized	(2,335		)	(265		)	—			—			—
	$	825,964		$	800,413		$	262,190		$	360,765		$	305,258
Computation of fixed charges and combined fixed charges and preferred stock dividends and losses on purchases of preferred stock:
Interest expense	$	491,184		$	404,968		$	406,222		$	386,447		$	332,058
Amortized premiums, discounts and capitalized expenses related to indebtedness	109,860			102,883			84,047			59,435			22,056
Interest capitalized	2,335			265			—			—			—
Interest component of operating lease expense	124,093			112,755			110,026			105,406			104,363
Fixed charges	727,472			620,871			600,295			551,288			458,477
Dividends on preferred stock and losses on purchases of preferred stock	2,629			22,940			20,806			20,806			20,806
Combined fixed charges and preferred stock dividends and losses on purchases of preferred stock	$	730,101		$	643,811		$	621,101		$	572,094		$	479,283
Ratio of earnings to fixed charges	1.1			1.3			—			—			—
(Deficiency) excess of earnings to cover fixed charges	$	98,492		$	179,542		$	(338,105	)	$	(190,523	)	$	(153,219	)
Ratio of earnings to combined fixed charges and preferred stock dividends and losses on purchases of preferred stock	1.1			1.2			—			—			—
(Deficiency) excess of earnings to cover combined fixed charges and preferred stock dividends and losses on purchases of preferred stock	$	95,863		$	156,602		$	(358,911	)	$	(211,329	)	$	(174,025	)