Hi Jed -- The call block feature does have a limit of ten entries on it. There is no option for adding more than ten numbers. If you have any other questions, please just let us know. Thanks!
Karl Verizon Support
Notice: Content posted by Verizon employees is meant to be informational and does not supersede or change the Verizon Forums User Guidelines or Terms or Service, or your Customer Agreement Terms and Conditions or Plan.