UA Unassignable Codes (e.g. N11, 555, 700, Home NPA, Test Codes, Set Aside Codes, etc.) RV Reserved for future use by a Code Holder. PR Codes protected for permissive dialing during a split. AS Assigned to a code holder (e.g., Wireless, ILEC, CLEC) for normal use. VC Vacant code (available for assignment).