The requirement is for SPs to report disconnected numbers; there is no requirement or process for removing previously reported numbers from the RND. The RND is not a database of currently disconnected telephone numbers. The purpose of the RND is to allow a Caller to find out if the number has been disconnected, and potentially reassigned, since the date when the Caller received consent to call the number. The numbers need to stay in the RND even after they’ve been reassigned.
The requirement is only to report permanently disconnected numbers to the RND, incrementally, on a monthly basis. As an example, a number permanently disconnected on October 16, 2021 will be reported to the RND by November 15, 2021. Because that number must be aged for 45 days after the permanent disconnection, it cannot be reassigned until after November 30, 2021. The consumer previously assigned that number will be protected because Callers will be expected to query the database each month indicating the telephone number and date of consent each time. Please also see the definition of permanent disconnect as defined in FCC 18-177, ¶38.