EXHIBIT 11

CROWN CASTLE INTERNATIONAL CORP.

COMPUTATION OF NET INCOME (LOSS)

PER COMMON SHARE

(IN THOUSANDS OF DOLLARS, EXCEPT PER SHARE AMOUNTS)

	Years Ended December 31,
	2009			2008			2007			2006			2005
Income (loss) from continuing operations attributable to CCIC stockholders	$	(114,332	)	$	(48,858	)	$	(222,813	)	$	(47,550	)	$	(391,743	)
Dividends on preferred stock		(20,806	)		(20,806	)		(20,805	)		(20,806	)		(37,354	)
Losses on purchases of preferred stock		—			—			—			—			(12,002	)
Income (loss) from continuing operations attributable to CCIC stockholders applicable to common stock for basic and diluted computations		(135,138	)		(69,664	)		(243,618	)		(68,356	)		(441,099	)
Income (loss) from discontinued operations attributable to CCIC stockholders		—			—			—			5,657			848
Cumulative effect of change in accounting principle attributable to CCIC stockholders		—			—			—			—			(9,031	)
Net income (loss) attributable to CCIC stockholders applicable to common stock for basic and diluted computations	$	(135,138	)	$	(69,664	)	$	(243,618	)	$	(62,699	)	$	(449,282	)
Weighted-average number of common shares outstanding during the period for basic and diluted computations (in thousands)		286,622			282,007			279,937			207,245			217,759
Per common share—basic and diluted:
Income (loss) from continuing operations attributable to CCIC stockholders	$	(0.47	)	$	(0.25	)	$	(0.87	)	$	(0.33	)	$	(2.02	)
Income (loss) from discontinued operations attributable to CCIC stockholders		—			—			—			0.03			—
Cumulative effect of change in accounting principle attributable to CCIC stockholders		—			—			—			—			(0.04	)
Net income (loss)	$	(0.47	)	$	(0.25	)	$	(0.87	)	$	(0.30	)	$	(2.06	)