Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB0HMZ callsign genealogy
Currently held by MILLHOLLIN, RONALD D
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 WB0HMZ's current licensee, walking backwards.
- Springman, Chris LIAgranted 2022-10-01cancelled 2022-10-18
Successor callsigns
Callsigns held now by people who previously held WB0HMZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB0HMZ, oldest first.
- MILLHOLLIN, RONALD D IA1996-02-07 → cancelled 2008-02-08
- Springman, Chris L IA2022-10-18 active