Blocking an outgoing number for a specific number through admin portal for all user Merged

we are looking for call blocking feature in admin portal for specific number for all user. Sometimes US people mailed us for do not call to them and by putting their number in block list will help to protect and not able to dial their number by any agent. This blocking feature is available in our one of Vonage service provider so i am requesting here to please provide this solution in Ring central.