If you want to request a specific toll-free number, called a vanity number, you need to check to see if the number is available and if it is, you need to reserve it. After you've reserved it, you can then order it. If you've already reserved a number, but no longer need it, you can cancel the number.
To reserve a toll-free number:
Control Center displays a list of all services assigned to the accounts under your enterprise ID. If you have more than 10 services, you can view the rest of your services by clicking one of the blue linked Show numbers at the top of the list or you can click the blue down arrow at the bottom of the list to add 10 services at a time to the view.