EXHIBIT 99.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO

                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Pursuant to 18 U.S.C. Section 1350 (as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002), I, the undersigned President and Chief Executive
Officer of FullNet Communications, Inc. (the "Company"), hereby certify that, to
the best of my knowledge, the Quarterly Report on Form 10-QSB of the Company for
the three months ended March 31, 2003 (the "Report") fully complies with the
requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934
and that information contained in the Report fairly presents, in all material
respects, the financial condition and results of operations of the Company.

Date:  May 13, 2003                        /s/ Timothy J. Kilkenny,
                                           -------------------------------------
                                           President and Chief Executive Officer