Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA9BBL callsign genealogy
Currently held by Imler, Zach 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 WA9BBL's current licensee, walking backwards.
- Imler, Zach LWIgranted 2016-05-02cancelled 2016-05-27
Successor callsigns
Callsigns held now by people who previously held WA9BBL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA9BBL, oldest first.
- WEST, FRANK A WI2006-11-30 → cancelled 2015-12-31
- Imler, Zach L WI2026-03-12 active