Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4JZL callsign genealogy
Currently held by Kozdron, Jeffrey 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 KK4JZL's current licensee, walking backwards.
- Kozdron, Jeffrey LFLgranted 2010-12-01cancelled 2012-06-15
Successor callsigns
Callsigns held now by people who previously held KK4JZL.
- Kozdron, Jeffrey LFLgranted 2022-06-14