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,
| 2011 |  | 2010 |  | 2009 |  | 2008 |  | 2007
Income (loss) from continuing operations attributable to CCIC stockholders | $ | 171,077 |  |  | $ | (310,940 | ) |  | $ | (114,332 | ) |  | $ | (48,858 | ) |  | $ | (222,813 | )
Dividends on preferred stock and losses on purchases of preferred stock | (22,940 | ) |  | (20,806 | ) |  | (20,806 | ) |  | (20,806 | ) |  | (20,805 | )
Income (loss) from continuing operations attributable to CCIC stockholders after deduction of dividends on preferred stock and losses on purchases of preferred stock for basic and diluted computations | 148,137 |  |  | (331,746 | ) |  | (135,138 | ) |  | (69,664 | ) |  | (243,618 | )
Income (loss) from discontinued operations attributable to CCIC stockholders | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net income (loss) attributable to CCIC stockholders after deduction of dividends on preferred stock and losses on purchases of preferred stock for basic and diluted computations | $ | 148,137 |  |  | $ | (331,746 | ) |  | $ | (135,138 | ) |  | $ | (69,664 | ) |  | $ | (243,618 | )
Weighted-average number of common shares outstanding during the period for basic and diluted computations (in thousands) | 283,821 |  |  | 286,764 |  |  | 286,622 |  |  | 282,007 |  |  | 279,937 |
Per common share-basic and diluted: |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations attributable to CCIC stockholders | $ | 0.52 |  |  | $ | (1.16 | ) |  | $ | (0.47 | ) |  | $ | (0.25 | ) |  | $ | (0.87 | )
Income (loss) from discontinued operations attributable to CCIC stockholders | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net income (loss) | $ | 0.52 |  |  | $ | (1.16 | ) |  | $ | (0.47 | ) |  | $ | (0.25 | ) |  | $ | (0.87 | )