LIMITED POWER OF ATTORNEY

FOR SECTION 16 REPORTING OBLIGATIONS



       Know all by these presents, that the undersigned hereby makes,

constitutes and appoints each of Thomas A. Bartlett, Edmund DiSanto,

Mneesha O. Nahata and Jody Hyvarinen, signing singly and each acting

individually, as the undersigned's true and lawful attorney-in-fact with

full power and authority as hereinafter described to:

       (1) execute for and on behalf of the undersigned, in the

undersigned's capacity as an officer of American Tower Corporation (the

?Company?), Form ID, including other documents necessary to obtain

EDGAR codes and passwords enabling the undersigned to make

electronic filings with the Securities and Exchange Commission,

Forms 3, 4, and 5 (including any amendments thereto) in accordance

with Section 16(a) of the Securities Exchange Act of 1934 and the rules

thereunder (the ?Exchange Act?);

       (2) do and perform any and all acts for and on behalf of the

undersigned which may be necessary or desirable to prepare, complete

and execute any such Form ID, Form 3, 4, or 5, prepare, complete and

execute any amendment or amendments thereto, and timely deliver and

file such form with the United States Securities and Exchange

Commission and any stock exchange or similar authority;

       (3) seek or obtain, as the undersigned?s representative and

on the undersigned?s behalf, information regarding transactions in the

Company?s securities from any third party, including brokers, employee

benefit plan administrators and trustees, and the undersigned hereby

authorizes any such person to release any such information to such

attorney-in-fact and approves and ratifies any such release of

information; and

       (4) take any other action of any type whatsoever in

connection with the foregoing which, in the opinion of such

attorney-in-fact, may be of benefit to, in the best interest of, or legally

required by, the undersigned, it being understood that the documents

executed by such attorney-in-fact on behalf of the undersigned pursuant

to this Power of Attorney shall be in such form and shall contain such

terms and conditions as such attorney-in-fact may approve in such

attorney-in-fact's discretion.

       The undersigned hereby grants to each such attorney-in-fact full

power and authority to do and perform any and every act and thing

whatsoever requisite, necessary, or proper to be done in the exercise of

any of the rights and powers herein granted, as fully to all intents and

purposes as the undersigned might or could do if personally present, with

full power of substitution or revocation, hereby ratifying and confirming

all that such attorney-in-fact, or such attorney-in-fact's substitute or

substitutes, shall lawfully do or cause to be done by virtue of this power

of attorney and the rights and powers herein granted.  The undersigned

acknowledges that the foregoing attorneys-in-fact, in serving in such

capacity at the request of the undersigned, are not assuming nor

relieving, nor is the Company assuming nor relieving, any of the

undersigned's responsibilities to comply with Section 16 of the Exchange

Act.

       The undersigned acknowledges that neither the Company nor the

foregoing attorneys-in-fact assume (i) any liability for the undersigned?s

responsibility to comply with the requirement of the Exchange Act, (ii)

any liability of the undersigned for any failure to comply with such

requirements, or (iii) any obligation or liability of the undersigned for

profit disgorgement under Section 16(b) of the Exchange Act.

       This Power of Attorney shall remain in full force and effect until

the undersigned is no longer required to file Forms 3, 4, and 5 with

respect to the undersigned's holdings of and transactions in securities

issued by the Company, unless earlier revoked by the undersigned in a

signed writing delivered to the foregoing attorneys-in-fact.

       IN WITNESS WHEREOF, the undersigned has caused this

Power of Attorney to be executed as of this _2_ day of _August, 2018.

/s/ Steven O. Vondran

Name: Steven O. Vondran







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