Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6YYZ callsign genealogy
Currently held by Grundman, Paul L
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 K6YYZ's current licensee, walking backwards.
- Ackerman, Loren JCAgranted 2025-06-28cancelled 2025-07-18
Successor callsigns
Callsigns held now by people who previously held K6YYZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6YYZ, oldest first.
- Grundman, Paul L CA2011-08-18 → cancelled 2023-08-29
- Ackerman, Loren CA2025-07-18 active