Confidence: Medium · Source: FCC ULS · As of 2026-09-15
K4YYM callsign genealogy
Currently held by BALZ, AUGUST H
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 K4YYM's current licensee, walking backwards.
- SOUCY, RONALD LSCgranted 2013-01-16cancelled 2014-05-23
Successor callsigns
Callsigns held now by people who previously held K4YYM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4YYM, oldest first.
- BALZ, AUGUST H SC1988-07-12 → cancelled 2000-07-13
- SOUCY, RONALD L SC2014-05-23 → cancelled 2026-05-27