Exhibit 24

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

    THAT, AT&T INC., a Delaware corporation, hereinafter referred to as the “Corporation,” proposes to file with the Securities and Exchange Commission at Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an annual report on Form 10-K; and

NOW, THEREFORE, each of the undersigned hereby constitutes and appoints John T. Stankey, Pascal Desroches, David R. McAtee II, Debra L. Dial, George B. Goeke, or any one of them, all of the City of Dallas and State of Texas, the attorneys for the undersigned and in the undersigned’s name, place and stead, and in the undersigned’s office and capacity in the Corporation, to execute and file such annual report, and thereafter to execute and file any amendment or amendments thereto, hereby giving and granting to said attorneys full power and authority to do and perform each and every act and thing whatsoever requisite and necessary to be done in and concerning the premises, as fully to all intents and purposes as the undersigned might or could do if personally present at the doing thereof, hereby ratifying and confirming all that said attorneys may or shall lawfully do, or cause to be done, by virtue hereof.

IN WITNESS WHEREOF, each of the undersigned has hereunto set his or her hand the date set forth opposite their name.

/s/ William E. Kennard

William E. Kennard

Chairman of the Board

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

    THAT, AT&T INC., a Delaware corporation, hereinafter referred to as the “Corporation,” proposes to file with the Securities and Exchange Commission at Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an annual report on Form 10-K; and

NOW, THEREFORE, each of the undersigned hereby constitutes and appoints John T. Stankey, Pascal Desroches, David R. McAtee II, Debra L. Dial, George B. Goeke, or any one of them, all of the City of Dallas and State of Texas, the attorneys for the undersigned and in the undersigned’s name, place and stead, and in the undersigned’s office and capacity in the Corporation, to execute and file such annual report, and thereafter to execute and file any amendment or amendments thereto, hereby giving and granting to said attorneys full power and authority to do and perform each and every act and thing whatsoever requisite and necessary to be done in and concerning the premises, as fully to all intents and purposes as the undersigned might or could do if personally present at the doing thereof, hereby ratifying and confirming all that said attorneys may or shall lawfully do, or cause to be done, by virtue hereof.

IN WITNESS WHEREOF, each of the undersigned has hereunto set his or her hand the date set forth opposite their name.

/s/ Scott T. Ford

Scott T. Ford

Director

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

    THAT, AT&T INC., a Delaware corporation, hereinafter referred to as the “Corporation,” proposes to file with the Securities and Exchange Commission at Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an annual report on Form 10-K; and

NOW, THEREFORE, each of the undersigned hereby constitutes and appoints John T. Stankey, Pascal Desroches, David R. McAtee II, Debra L. Dial, George B. Goeke, or any one of them, all of the City of Dallas and State of Texas, the attorneys for the undersigned and in the undersigned’s name, place and stead, and in the undersigned’s office and capacity in the Corporation, to execute and file such annual report, and thereafter to execute and file any amendment or amendments thereto, hereby giving and granting to said attorneys full power and authority to do and perform each and every act and thing whatsoever requisite and necessary to be done in and concerning the premises, as fully to all intents and purposes as the undersigned might or could do if personally present at the doing thereof, hereby ratifying and confirming all that said attorneys may or shall lawfully do, or cause to be done, by virtue hereof.

IN WITNESS WHEREOF, each of the undersigned has hereunto set his or her hand the date set forth opposite their name.

/s/ Glenn H. Hutchins

Glenn H. Hutchins

Director

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

    THAT, AT&T INC., a Delaware corporation, hereinafter referred to as the “Corporation,” proposes to file with the Securities and Exchange Commission at Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an annual report on Form 10-K; and

NOW, THEREFORE, each of the undersigned hereby constitutes and appoints John T. Stankey, Pascal Desroches, David R. McAtee II, Debra L. Dial, George B. Goeke, or any one of them, all of the City of Dallas and State of Texas, the attorneys for the undersigned and in the undersigned’s name, place and stead, and in the undersigned’s office and capacity in the Corporation, to execute and file such annual report, and thereafter to execute and file any amendment or amendments thereto, hereby giving and granting to said attorneys full power and authority to do and perform each and every act and thing whatsoever requisite and necessary to be done in and concerning the premises, as fully to all intents and purposes as the undersigned might or could do if personally present at the doing thereof, hereby ratifying and confirming all that said attorneys may or shall lawfully do, or cause to be done, by virtue hereof.

IN WITNESS WHEREOF, each of the undersigned has hereunto set his or her hand the date set forth opposite their name.

/s/ Stephen J. Luczo

Stephen J. Luczo

Director

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

    THAT, AT&T INC., a Delaware corporation, hereinafter referred to as the “Corporation,” proposes to file with the Securities and Exchange Commission at Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an annual report on Form 10-K; and

NOW, THEREFORE, each of the undersigned hereby constitutes and appoints John T. Stankey, Pascal Desroches, David R. McAtee II, Debra L. Dial, George B. Goeke, or any one of them, all of the City of Dallas and State of Texas, the attorneys for the undersigned and in the undersigned’s name, place and stead, and in the undersigned’s office and capacity in the Corporation, to execute and file such annual report, and thereafter to execute and file any amendment or amendments thereto, hereby giving and granting to said attorneys full power and authority to do and perform each and every act and thing whatsoever requisite and necessary to be done in and concerning the premises, as fully to all intents and purposes as the undersigned might or could do if personally present at the doing thereof, hereby ratifying and confirming all that said attorneys may or shall lawfully do, or cause to be done, by virtue hereof.

IN WITNESS WHEREOF, each of the undersigned has hereunto set his or her hand the date set forth opposite their name.

/s/ Michael B. McCallister

Michael B. McCallister

Director

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

    THAT, AT&T INC., a Delaware corporation, hereinafter referred to as the “Corporation,” proposes to file with the Securities and Exchange Commission at Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an annual report on Form 10-K; and

NOW, THEREFORE, each of the undersigned hereby constitutes and appoints John T. Stankey, Pascal Desroches, David R. McAtee II, Debra L. Dial, George B. Goeke, or any one of them, all of the City of Dallas and State of Texas, the attorneys for the undersigned and in the undersigned’s name, place and stead, and in the undersigned’s office and capacity in the Corporation, to execute and file such annual report, and thereafter to execute and file any amendment or amendments thereto, hereby giving and granting to said attorneys full power and authority to do and perform each and every act and thing whatsoever requisite and necessary to be done in and concerning the premises, as fully to all intents and purposes as the undersigned might or could do if personally present at the doing thereof, hereby ratifying and confirming all that said attorneys may or shall lawfully do, or cause to be done, by virtue hereof.

IN WITNESS WHEREOF, each of the undersigned has hereunto set his or her hand the date set forth opposite their name.

/s/ Beth E. Mooney

Beth E. Mooney

Director

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

    THAT, AT&T INC., a Delaware corporation, hereinafter referred to as the “Corporation,” proposes to file with the Securities and Exchange Commission at Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an annual report on Form 10-K; and

NOW, THEREFORE, each of the undersigned hereby constitutes and appoints John T. Stankey, Pascal Desroches, David R. McAtee II, Debra L. Dial, George B. Goeke, or any one of them, all of the City of Dallas and State of Texas, the attorneys for the undersigned and in the undersigned’s name, place and stead, and in the undersigned’s office and capacity in the Corporation, to execute and file such annual report, and thereafter to execute and file any amendment or amendments thereto, hereby giving and granting to said attorneys full power and authority to do and perform each and every act and thing whatsoever requisite and necessary to be done in and concerning the premises, as fully to all intents and purposes as the undersigned might or could do if personally present at the doing thereof, hereby ratifying and confirming all that said attorneys may or shall lawfully do, or cause to be done, by virtue hereof.

IN WITNESS WHEREOF, each of the undersigned has hereunto set his or her hand the date set forth opposite their name.

/s/ Matthew K. Rose

Matthew K. Rose

Director

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

    THAT, AT&T INC., a Delaware corporation, hereinafter referred to as the “Corporation,” proposes to file with the Securities and Exchange Commission at Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an annual report on Form 10-K; and

NOW, THEREFORE, each of the undersigned hereby constitutes and appoints Pascal Desroches, David R. McAtee II, Debra L. Dial, George B. Goeke, or any one of them, all of the City of Dallas and State of Texas, the attorneys for the undersigned and in the undersigned’s name, place and stead, and in the undersigned’s office and capacity in the Corporation, to execute and file such annual report, and thereafter to execute and file any amendment or amendments thereto, hereby giving and granting to said attorneys full power and authority to do and perform each and every act and thing whatsoever requisite and necessary to be done in and concerning the premises, as fully to all intents and purposes as the undersigned might or could do if personally present at the doing thereof, hereby ratifying and confirming all that said attorneys may or shall lawfully do, or cause to be done, by virtue hereof.

IN WITNESS WHEREOF, each of the undersigned has hereunto set his or her hand the date set forth opposite their name.

/s/ John T. Stankey

John T. Stankey

Director

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

    THAT, AT&T INC., a Delaware corporation, hereinafter referred to as the “Corporation,” proposes to file with the Securities and Exchange Commission at Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an annual report on Form 10-K; and

NOW, THEREFORE, each of the undersigned hereby constitutes and appoints John T. Stankey, Pascal Desroches, David R. McAtee II, Debra L. Dial, George B. Goeke, or any one of them, all of the City of Dallas and State of Texas, the attorneys for the undersigned and in the undersigned’s name, place and stead, and in the undersigned’s office and capacity in the Corporation, to execute and file such annual report, and thereafter to execute and file any amendment or amendments thereto, hereby giving and granting to said attorneys full power and authority to do and perform each and every act and thing whatsoever requisite and necessary to be done in and concerning the premises, as fully to all intents and purposes as the undersigned might or could do if personally present at the doing thereof, hereby ratifying and confirming all that said attorneys may or shall lawfully do, or cause to be done, by virtue hereof.

IN WITNESS WHEREOF, each of the undersigned has hereunto set his or her hand the date set forth opposite their name.

/s/ Cynthia B. Taylor

Cynthia B. Taylor

Director

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

    THAT, AT&T INC., a Delaware corporation, hereinafter referred to as the “Corporation,” proposes to file with the Securities and Exchange Commission at Washington, D.C., under the provisions of the Securities Exchange Act of 1934, as amended, an annual report on Form 10-K; and

NOW, THEREFORE, each of the undersigned hereby constitutes and appoints John T. Stankey, Pascal Desroches, David R. McAtee II, Debra L. Dial, George B. Goeke, or any one of them, all of the City of Dallas and State of Texas, the attorneys for the undersigned and in the undersigned’s name, place and stead, and in the undersigned’s office and capacity in the Corporation, to execute and file such annual report, and thereafter to execute and file any amendment or amendments thereto, hereby giving and granting to said attorneys full power and authority to do and perform each and every act and thing whatsoever requisite and necessary to be done in and concerning the premises, as fully to all intents and purposes as the undersigned might or could do if personally present at the doing thereof, hereby ratifying and confirming all that said attorneys may or shall lawfully do, or cause to be done, by virtue hereof.

IN WITNESS WHEREOF, each of the undersigned has hereunto set his or her hand the date set forth opposite their name.

/s/ Luis A. Ubiñas

Luis A. Ubiñas

Director