Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7AZF callsign genealogy
Currently held by TYSDAL, ROBERT D
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 K7AZF's current licensee, walking backwards.
- Fietcher, Justin MAZgranted 2019-04-22cancelled 2019-05-17
Successor callsigns
Callsigns held now by people who previously held K7AZF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7AZF, oldest first.
- TYSDAL, ROBERT D OR1996-06-14 → cancelled 2008-06-17
- FLETCHER, JUSTIN M AZ2019-05-17 active