JOINT FILING AGREEMENT
EXHIBIT A
Xxxx Xxxxxxxxx, Governing Dynamics Investments, LLC, Xxxxxx X. Xxxxxx, Thai
Xxx and Thai Xxx 2003 Grat A, each hereby agrees, in accordance with Rule 13d-1(f)
under the Securities Exchange Act of 1934, as amended, that the Schedule 13D filed
herewith, and any amendment thereto, relating to the shares of common stock,
$0.001 par value per share, of Arbinet-thexchange, Inc. are, and will be, filed
jointly on behalf of such person. In addition, each party to this Agreement
expressly authorizes each other party to this Agreement to file on its behalf any
and all amendments to such Schedule.
Date: March 27, 2006
| /s/ Xxxx Xxxxxxxxx | ||||
| Xxxx Xxxxxxxxx | ||||
| GOVERNING DYNAMICS INVESTMENTS, LLC | ||||
| By: | /s/ Xxxx Xxxxxxxxx | |||
| Name: Xxxx Xxxxxxxxx Title: Manager |
||||
| /s/ Xxxxxx X. Xxxxxx | ||||
| Xxxxxx X. Xxxxxx | ||||
| /s/ Thai Xxx | ||||
| Thai Xxx | ||||
| THAI XXX 2003 GRAT A | ||||
| By: | /s/ Thai Xxx | |||
| Name: Thai Xxx Title: Trustee |
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