The CUSIP number for Vonage's common stock is 92886T 20 1.
Who do I contact with questions about transferring shares, lost stock certificates or change of address information?
If you are a registered stockholder and have questions regarding your holdings or if there are any changes to be made to the account (mailing address, account name), please contact the Company's transfer agent, American Stock Transfer & Trust Company, at the following:
American Stock Transfer & Trust Company c/o Vonage Holdings Corp. 59 Maiden Lane Plaza Level New York, NY 10038
Phone: (800) 937-5449 or (718) 921-8124 (for international callers)