EXHIBIT 21
CROWN CASTLE INTERNATIONAL CORP. SUBSIDIARIES

Subsidiary |  | Jurisdiction of Incorporation
CC Holdings GS V LLC |  | Delaware
CC Towers Guarantor LLC |  | Delaware
CC Towers Holding LLC |  | Delaware
CCGS Holdings Corp. |  | Delaware
Crown Atlantic Company LLC |  | Delaware
Crown Castle Atlantic LLC |  | Delaware
Crown Castle Australia Holdings Pty Limited |  | Australia
Crown Castle Australia Pty Ltd |  | Australia
Crown Castle CA Corp. |  | Delaware
Crown Castle GT Company LLC |  | Delaware
Crown Castle GT Corp. |  | Delaware
Crown Castle GT Holding Sub LLC |  | Delaware
Crown Castle MU LLC |  | Delaware
Crown Castle Operating Company |  | Delaware
Crown Castle Operating LLC |  | Delaware
Crown Castle PT Inc. |  | Delaware
Crown Castle Solutions Corp. |  | Delaware
Crown Castle South LLC |  | Delaware
Crown Castle Towers 06-2 LLC |  | Delaware
Crown Castle Towers LLC |  | Delaware
Crown Castle USA Inc. |  | Pennsylvania
Crown Communication LLC (f/k/a Crown Communication Inc. d/b/a/ Crown Communications and CrownCom) |  | Delaware
Global Signal Acquisitions II LLC |  | Delaware
Global Signal Acquisitions III LLC |  | Delaware
Global Signal Acquisitions IV LLC |  | Delaware
Global Signal GP LLC |  | Delaware
Global Signal Holdings III LLC |  | Delaware
Global Signal Operating Partnership, L.P. |  | Delaware
MW Cell REIT 1 LLC |  | Delaware
NewPath Networks, Inc. |  | Delaware
Pinnacle Towers Acquisition LLC |  | Delaware
Pinnacle Towers Acquisitions Holdings LLC |  | Delaware
Pinnacle Towers LLC |  | Delaware
WCP Wireless Site RE Funding LLC |  | Delaware
WCP Wireless Site RE Holdco LLC |  | Delaware