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)

	Nine Months Ended September 30,						Years Ended December 31,
	2012			2011			2011			2010			2009			2008			2007
Computation of earnings:
Income (loss) before income taxes	$	181,095		$	130,284		$	179,807		$	(338,105	)	$	(190,523	)	$	(153,219	)	$	(317,003	)
Add:
Fixed charges (as computed below)		520,687			465,259			620,871			600,295			551,288			458,477			454,731
Subtract:
Interest capitalized		(1,865	)		(111	)		(265	)		—			—			—			(1,406	)
	$	699,917		$	595,432		$	800,413		$	262,190		$	360,765		$	305,258		$	136,322
Computation of fixed charges and combined fixed charges and preferred stock dividends and losses on purchases of preferred stock:
Interest expense	$	353,701		$	303,067		$	404,968		$	406,222		$	386,447		$	332,058		$	329,610
Amortized premiums, discounts and capitalized interest expense related to indebtedness		75,525			77,332			102,883			84,047			59,435			22,056			20,649
Interest capitalized		1,865			111			265			0			0			0			1,406
Interest component of operating lease expense		89,596			84,749			112,755			110,026			105,406			104,363			103,066
Fixed charges		520,687			465,259			620,871			600,295			551,288			458,477			454,731
Dividends on preferred stock and losses on purchases of preferred stock		2,629			17,944			22,940			20,806			20,806			20,806			20,805
Combined fixed charges and preferred stock dividends and losses on purchases of preferred stock	$	523,316		$	483,203		$	643,811		$	621,101		$	572,094		$	479,283		$	475,536
Ratio of earnings to fixed charges		1.3			1.3			1.3			0			0			0			0
(Deficiency) excess of earnings to cover fixed charges	$	179,230		$	130,173		$	179,542		$	(338,105	)	$	(190,523	)	$	(153,219	)	$	(318,409	)
Ratio of earnings to combined fixed charges and preferred stock dividends and losses on purchases of preferred stock		1.3			1.2			1.2			0			0			0			0
(Deficiency) excess of earnings to cover combined fixed charges and preferred stock dividends and losses on purchases of preferred stock	$	176,601		$	112,229		$	156,602		$	(358,911	)	$	(211,329	)	$	(174,025	)	$	(339,214	)