Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9RDH callsign genealogy
Currently held by HEIN, 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 W9RDH's current licensee, walking backwards.
- HEIN, RONALD DMIgranted 2011-03-01cancelled 2018-10-06
Successor callsigns
Callsigns held now by people who previously held W9RDH.
No current licensee on record previously held this callsign.