Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD9ZM callsign genealogy
Currently held by MAPES, ZACHARY W
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 KD9ZM's current licensee, walking backwards.
- MAPES, ZACHARY WINgranted 2019-10-29cancelled 2024-06-28
Successor callsigns
Callsigns held now by people who previously held KD9ZM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD9ZM, oldest first.
- PETERSON, RICHARD H FL1996-11-04 → cancelled 2008-11-05
- MAPES, ZACHARY W IN2024-06-28 active