Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB9BHL callsign genealogy
Currently held by GROETZENBACH JR, ROBERT G
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 WB9BHL's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held WB9BHL.
- GROETZENBACH JR, ROBERT GILgranted 2023-03-21