EXHIBIT 31.3
CERTIFICATION
PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
I, Marc P. Lefar, certify that:
1. I have reviewed this quarterly report on Form 10-Q of Vonage Holdings Corp., as amended by this Amendment No. 1; and
2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.
| Date: December 18, 2008 | /s/ MARC P. LEFAR | |
| Marc P. Lefar | ||
| Chief Executive Officer |
