EXHIBIT 24
 
                               POWER OF ATTORNEY
 
    KNOW ALL MEN BY THESE PRESENTS:
 
    WHEREAS, MEDIAONE GROUP, INC., a Delaware corporation (hereinafter referred
to as the "Company"), proposes to file with the Securities and Exchange
Commission under the provisions of the Securities Act of 1933 as amended, a Form
S-3 Registration Statement for up to $1.5 billion of debt securities (the
"Registration"); and
 
    WHEREAS, each of the undersigned is a Director of the Company;
 
    NOW THEREFORE, each of the undersigned constitutes and appoints CONSTANCE P.
CAMPBELL and STEPHEN E. BRILZ, and each of them, as attorneys for him or her and
in his or her name, place, and stead, and in his or her capacity as a Director
of the Company, to execute and file such Registration, 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 all and every act and thing
whatsoever requisite and necessary to be done in and about the premises as
fully, to all intents and purposes, as he or she 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 executed this Power of
Attorney this 16th day of June 1998.
 

                                           
/s/ GRANT A. DOVE                             /s/ CHARLES P. RUSS III
- -------------------------------------------   -------------------------------------------
Grant A. Dove                                 Charles P. Russ III
 
/s/ PIERSON M. GRIEVE                         /s/ LOUIS A. SIMPSON
- -------------------------------------------   -------------------------------------------
Pierson M. Grieve                             Louis A. Simpson
 
/s/ CHARLES M. LILLIS                         /s/ JACK SLEVIN
- -------------------------------------------   -------------------------------------------
Charles M. Lillis                             Jack Slevin

 

                               POWER OF ATTORNEY
 
    KNOW ALL MEN BY THESE PRESENTS:
 
    WHEREAS, MEDIAONE GROUP, INC., a Delaware corporation (hereinafter referred
to as the "Company"), proposes to file with the Securities and Exchange
Commission, under the provisions of the Securities Act of 1933 as amended, a
Form S-3 Registration Statement for up to $1.5 billion of debt securities (the
"Registration"); and
 
    WHEREAS, the undersigned is an officer or Director, or both, of the Company
and holds the office, or offices, in the Company as indicated below his name;
 
    NOW THEREFORE, the undersigned hereby constitutes and appoints CONSTANCE P.
CAMPBELL and STEPHEN E. BRILZ, and each of them, as attorneys for him and in his
name, place, and stead, and in each of his offices and capacities in the
Company, to execute and file such Registration, 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 all and every act and thing
whatsoever requisite and necessary to be done in and about the premises as
fully, to all intents and purposes, as he 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, the undersigned has executed this Power of Attorney this
16th day of June, 1998.
 
                                          /s/ CHARLES M. LILLIS
 
                                          --------------------------------------
 
                                          Charles M. Lillis
                                          Chairman of the Board, Chief Executive
 
                                          Officer and President

                               POWER OF ATTORNEY
 
    KNOW ALL MEN BY THESE PRESENTS:
 
    WHEREAS, MEDIAONE GROUP, INC., a Delaware corporation (hereinafter referred
to as the "Company"), proposes to file with the Securities and Exchange
Commission, under the provisions of the Securities Act of 1933 as amended, a
Form S-3 Registration Statement for up to $1.5 billion of debt securities (the
"Registration"); and
 
    WHEREAS, the undersigned is an officer or Director, or both, of the Company
and holds the office, or offices, in the Company as indicated below his name;
 
    NOW THEREFORE, the undersigned hereby constitutes and appoints CONSTANCE P.
CAMPBELL and STEPHEN E. BRILZ, and each of them, as attorneys for him and in his
name, place, and stead, and in each of his offices and capacities in the
Company, to execute and file such Registration, 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 all and every act and thing
whatsoever requisite and necessary to be done in and about the premises as
fully, to all intents and purposes, as he 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, the undersigned has executed this Power of Attorney this
16th day of June, 1998.
 
                                          /s/ RICHARD POST
 
                                          --------------------------------------
 
                                          Richard Post
                                          Executive Vice President and
 
                                          Chief Financial Officer