This parameter defines number ranges for telephone number prefixes. They are used to identify if unallocated number services apply to incoming requests addressing a telephone number.
This is the key attribute of the CscfOperatorAllocatedNumberRangeListClass class. One instance of the CscfOperatorAllocatedNumberRangeListClass with the key cscfOperatorAllocatedNumberRangeList=0 is created at startup. This instance cannot be deleted. No other instances can be created of this class.