Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ERN callsign genealogy
Currently held by SHANNON, JOHN G
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 K4ERN's current licensee, walking backwards.
- SHANNON, JOHN GFLgranted 2023-07-21cancelled 2023-12-30
Successor callsigns
Callsigns held now by people who previously held K4ERN.
- SHANNON, JOHN GFLgranted 2026-04-14
All historical holders
Every license row we've seen with the callsign K4ERN, oldest first.
- ORR, ERNEST D NC2010-02-24 → cancelled 2022-04-22
- SHANNON, JOHN G FL2023-12-30 → cancelled 2026-04-14