Exhibit 23.1
CONSENT OF INDEPENDENT AUDITORS
We consent to the incorporation by reference in the Current Report on Form8-K/A of Crown Castle International Corp. dated December 15, 2017 of our report dated March 10, 2017 related to the consolidated financial statements of LTS Group Holdings LLC and its subsidiary as of and for the year ended December 31, 2016, and incorporated by reference in Registration Statements on FormS-8 (No.333-212383,333-118659,333-163843,333-181715, and333-188801) and Registration Statement on FormS-3 ASR (No.333-203074) of Crown Castle International Corp.
/s/ DELOITTE & TOUCHE LLP
Rochester, New York
December 15, 2017