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 Form 10-K of Arbinet-thexchange, Inc. (the “Company”) for the period ended December 31, 2005 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, J. Curt Hockemeier, President and Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, that:
(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and
(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
| Dated:March 14, 2006 | /s/ J. Curt Hockemeier | * | ||
| J. Curt Hockemeier, | ||||
| President and Chief Executive Officer | ||||
| (Principal Executive Officer) |
| * | A signed original of this written statement required by Section 906 has been provided to Arbinet-thexchange, Inc. and will be retained by Arbinet-thexchange, Inc. and furnished to the Securities and Exchange Commission or its staff upon request. |