Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KL7KBN callsign genealogy
Currently held by Bierwirth, Charles W
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 KL7KBN's current licensee, walking backwards.
- Bierwirth, Charles WAKgranted 2020-07-22cancelled 2022-12-02
Successor callsigns
Callsigns held now by people who previously held KL7KBN.
- Bierwirth, Charles WKSgranted 2025-08-12