Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9RZ callsign genealogy
Currently held by HAGBERG, DAVID J
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 KC9RZ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KC9RZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC9RZ, oldest first.
- HAGBERG, DAVID J FL1999-08-28 → cancelled 2011-11-22
- Offerdahl, Eric J WI2025-03-08 active