Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9ZJD callsign genealogy
Currently held by PFEIFER, MICHAEL L
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 KC9ZJD's current licensee, walking backwards.
- PFEIFER, MICHAEL LILgranted 2006-07-28cancelled 2013-07-23
Successor callsigns
Callsigns held now by people who previously held KC9ZJD.
- PFEIFER, MICHAEL LFLgranted 2023-08-23