Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD0ZAM callsign genealogy
Currently held by CALL, CALVIN 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 KD0ZAM's current licensee, walking backwards.
- CALL, CALVIN DCOgranted 2025-11-26
Successor callsigns
Callsigns held now by people who previously held KD0ZAM.
All historical holders
Every license row we've seen with the callsign KD0ZAM, oldest first.
- CALL, CALVIN D CO2014-02-10 → cancelled 2014-03-26
- CALL, CALVIN D CO2015-10-24 → cancelled 2015-12-12