Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB9JMC callsign genealogy
Currently held by COUGHLIN, JACOB M
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 KB9JMC's current licensee, walking backwards.
- COUGHLIN, JACOB MFLgranted 2021-01-13cancelled 2021-02-02
Successor callsigns
Callsigns held now by people who previously held KB9JMC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB9JMC, oldest first.
- TUMAN II, WILLIAM W IL2005-06-30 → cancelled 2017-07-01
- COUGHLIN, JACOB M FL2021-02-02 active