6.6 Number Transfer or "Port" on Service Disconnection.
(a) Single line Accounts.You may be able to take, or "port," your current number to another service provider. If you ask your new service provider to port a number from us, and we receive your request from the new service provider, we will automatically terminate our service for that number upon successful completion of the port. Once your service is terminated and the port is completed, you will remain responsible for all charges and fees through the end of that billing cycle, including any cancellation fees. If a port is unsuccessful for any reason, your service and your agreement with us will not terminate, you will remain a Vonage customer, and you will continue to be responsible for all charges and fees associated with your Vonage service.

Disconnection Fee (Does Not Apply to Business Plus Customers).
You will be charged a disconnection fee of $39.99 per voice line if your service is disconnected, subject to state and local laws. However, if your subscription date is on or after February 1, 2007 and is disconnected after 2 years following your subscription date, the disconnection fee is waived. If your subscription date is on or before January 31, 2007, the disconnection fee is waived if your service is disconnected 1 year following your subscription date.