Confidence: Medium · Source: FCC ULS · As of 2026-09-11
AJ4OI
ActiveStapleton, Michael A
- Location
- HARRODSBURG, KY
- Class
- Amateur Extra
- Granted
- 2018-10-10
- Expires
- 2028-11-12
- Previous call
- KJ4HVO
- FRN
- 0018267328
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Vanity availability
HeldCurrently held
AJ4OI is held by an active license; it isn't a vanity slot right now.
Vanity availability dates are computed from FCC §97.19's hold periods: 2 years from the cancellation date for cancelled or terminated licenses, 4 years from the expiration date for expired licenses (2-year renewal grace + 2-year hold).
Callsign genealogy
Full chain →Previously held by current licensee
- Stapleton, Michael AKYgranted 2008-11-12cancelled 2009-02-19
License history
0 eventsNo recorded events.