Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4SF callsign genealogy
Currently held by COLVIN, CARROLL C
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 KM4SF's current licensee, walking backwards.
- Deck, Daniel EFLgranted 2017-12-13cancelled 2023-04-07
Successor callsigns
Callsigns held now by people who previously held KM4SF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KM4SF, oldest first.
- COLVIN, CARROLL C AL1989-05-16 → cancelled 2001-05-17
- Deck, Daniel E FL2023-04-07 active