Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6UNF callsign genealogy
Currently held by BIONDI, WALTER E
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 W6UNF's current licensee, walking backwards.
- MARKLINGER, DOUGLAS BCAgranted 2018-12-11cancelled 2018-12-11
Successor callsigns
Callsigns held now by people who previously held W6UNF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6UNF, oldest first.
- BIONDI, WALTER E CA2006-08-17 → cancelled 2018-10-02
- MARKLINGER, DOUGLAS B CA2018-12-11 active