dormant-numbers

Registration status plus username, user ID, last-seen time, active days and the member flag across a whole list.

Registration status plus last-active time, active days and the Business flag, so you can tell live numbers from dormant ones across a whole list.

Let the next follow-up start with an activity signal. Find recent activity across a full number list, separate dormant records from numbers worth reviewing, and use the result to plan reactivation, segmentation and outreach priorities.