Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K8JFO callsign genealogy
Currently held by CLARK, JEFFREY A
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 K8JFO's current licensee, walking backwards.
- CLARK, JEFFREY AMIgranted 2005-02-22cancelled 2005-03-19
Successor callsigns
Callsigns held now by people who previously held K8JFO.
- Shaffer, James EOHgranted 2022-09-13
All historical holders
Every license row we've seen with the callsign K8JFO, oldest first.
- Shaffer, James E OH1998-10-29 → cancelled 2002-09-21
- CLARK, JEFFREY A MI2025-03-12 active