Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4JMP callsign genealogy
Currently held by MULLIN, ROBERT B
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 KD4JMP's current licensee, walking backwards.
- PATRICK, JAMESALgranted 2023-02-16cancelled 2023-03-14
Successor callsigns
Callsigns held now by people who previously held KD4JMP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4JMP, oldest first.
- MULLIN, ROBERT B VA1992-01-21 → cancelled 2004-01-22
- PATRICK, JAMES M AL2023-03-14 active