EXHIBIT 32.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Alaska Communications Systems Group, Inc. (the "Company") on Form 10-K for the fiscal year ending December 31, 2004 (the "Report"), I, Liane Pelletier, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, that: (1) The Report fully complies with the requirements of section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934 as amended; and (2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company. Date: March 7, 2005 /s/ Liane Pelletier ------------------- Liane Pelletier Chief Executive Officer, Chairman of the Board and President Alaska Communications Systems Group, Inc.