Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WT0Z callsign genealogy
Currently held by Glapa, Martin J
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 WT0Z's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WT0Z.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WT0Z, oldest first.
- LAMBERT, CLARENCE IA2008-11-05 → cancelled 2021-02-04
- Glapa, Martin J CO2021-02-23 active