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,
	2000			2001			2002			2003			2004
Loss from continuing operations before cumulative effect of change in accounting principle	$	(227,549	)	$	(363,436	)	$	(328,962	)	$	(464,769	)	$	(306,896	)
Dividends on preferred stock		(59,469	)		(79,028	)		(79,786	)		(54,294	)		(38,618	)
Gains (losses) on purchases of preferred stock		—			—			95,809			(1,603	)		—
Loss from continuing operations before cumulative effect of change in accounting principle applicable to common stock for basic and diluted computations		(287,018	)		(442,464	)		(312,939	)		(520,666	)		(345,514	)
Income (loss) from discontinued operations		(9,788	)		(45,158	)		9,041			10,458			542,006
Cumulative effect of change in accounting principle		—			—			—			(551	)		—
Net income (loss) applicable to common stock for basic and diluted computations	$	(296,806	)	$	(487,622	)	$	(303,898	)	$	(510,759	)	$	196,492
Weighted-average number of common shares outstanding during the period for basic and diluted computations (in thousands)		178,588			214,246			218,028			216,947			221,693
Per common share—basic and diluted:
Loss from continuing operations before cumulative effect of change in accounting principle	$	(1.61	)	$	(2.07	)	$	(1.43	)	$	(2.40	)	$	(1.56	)
Income (loss) from discontinued operations		(0.05	)		(0.21	)		0.04			0.05			2.45
Cumulative effect of change in accounting principle		—			—			—			(0.01	)		—
Net income (loss)	$	(1.66	)	$	(2.28	)	$	(1.39	)	$	(2.36	)	$	0.89