Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD6WB callsign genealogy
Currently held by ZIMMERMAN, LOUIS
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 AD6WB's current licensee, walking backwards.
- Bybee, William ECAgranted 2008-01-24cancelled 2011-01-04
Successor callsigns
Callsigns held now by people who previously held AD6WB.
- ZIMMERMAN, LOUISCAgranted 2021-08-17
All historical holders
Every license row we've seen with the callsign AD6WB, oldest first.
- ZIMMERMAN, LOUIS CA1991-11-12 → cancelled 2001-04-13
- Bybee, William E CA2020-10-09 active