Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4FMF callsign genealogy
Currently held by SPANGLER, CAROLYN E
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 K4FMF's current licensee, walking backwards.
- Coker, John CTNgranted 2022-11-08cancelled 2023-01-10
Successor callsigns
Callsigns held now by people who previously held K4FMF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4FMF, oldest first.
- SPANGLER, CAROLYN E FL2002-05-23 → cancelled 2014-06-10
- Coker, John C TN2023-01-10 active