Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WA4QFI callsign genealogy
Currently held by GRIZZLE SR, JOHN I
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 WA4QFI's current licensee, walking backwards.
- GRIZZLE JR, JOHN INCgranted 2019-08-23cancelled 2019-09-13
Successor callsigns
Callsigns held now by people who previously held WA4QFI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA4QFI, oldest first.
- GRIZZLE SR, JOHN I FL2004-04-01 → cancelled 2016-06-11
- Grizzle JR, John I FL2019-09-13 active