Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI4OJO callsign genealogy
Currently held by JACKSON, MICHAEL K
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by KI4OJO's current licensee, walking backwards.
- JACKSON, MICHAEL KTNgranted 2018-06-22cancelled 2024-07-13
Successor callsigns
Callsigns held now by people who previously held KI4OJO.
- JACKSON, MICHAEL KTNgranted 2018-06-22cancelled 2024-07-13
All historical holders
Every license row we've seen with the callsign KI4OJO, oldest first.
- JACKSON, MICHAEL K TN2016-02-25 → cancelled 2018-06-22
- JACKSON, MICHAEL K TN2024-07-13 active