Aging Numbers:

Aging numbers are disconnected numbers that are not available for assignment to another end user or customer for a specified period of time. Numbers previously assigned to residential customers may be aged for no more than 90 calendar days. Numbers previously assigned to business customers may be aged for no more than 365 calendar days (FCC 00-104 §52.15 (f)(1) (ii)) and Erratum in CC Docket 99-200, released July 11, 2000.).