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EXHIBIT 21

CROWN CASTLE INC. SUBSIDIARIES

Subsidiary						Jurisdiction of Incorporation
Assurable Insurance LLC						Texas
CC Holdings GS V LLC						Delaware
CC Towers Guarantor LLC						Delaware
CC Towers Holding LLC						Delaware
CCATT Holdings LLC						Delaware
CCATT LLC						Delaware
CCGS Holdings Corp.						Delaware
CCTM Holdings LLC						Delaware
CCTMO LLC						Delaware
Crown Atlantic Company LLC						Delaware
Crown Castle Atlantic LLC						Delaware
Crown Castle CA Corp.						Delaware
Crown Castle Fiber Holdings Corp.(a)						Delaware
Crown Castle Fiber LLC(a)						New York
Crown Castle GT Company LLC						Delaware
Crown Castle GT Corp.						Delaware
Crown Castle GT Holding Sub LLC						Delaware
Crown Castle Investment II Corp.						Delaware
Crown Castle Operating Company						Delaware
Crown Castle PR Holdings LLC						Delaware
Crown Castle South LLC						Delaware
Crown Castle Towers 06-2 LLC						Delaware
Crown Castle Towers 09 LLC						Delaware
Crown Castle Towers LLC						Delaware
Crown Castle USA Inc.						Pennsylvania
Crown Communication LLC						Delaware
Global Signal Acquisitions II LLC						Delaware
Global Signal Acquisitions III LLC						Delaware
Global Signal Acquisitions IV LLC						Delaware
Global Signal Holdings III LLC						Delaware
Global Signal Operating Partnership, LP						Delaware
Pinnacle Towers Acquisition Holdings LLC						Delaware
Pinnacle Towers Acquisition LLC						Delaware
Pinnacle Towers LLC						Delaware
PR Site Development Corporation						Delaware

(a)Included within discontinued operations. See note 3 to our consolidated financial statements for further discussion of the pending sale of the Fiber Business.