Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KL7ZK callsign genealogy
Currently held by MONTOYA, DOUGLAS B
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 KL7ZK's current licensee, walking backwards.
- TREMPER, DAVID AAKgranted 2026-04-28
Successor callsigns
Callsigns held now by people who previously held KL7ZK.
- TREMPER, DAVID AAKgranted 2026-04-28
All historical holders
Every license row we've seen with the callsign KL7ZK, oldest first.
- MONTOYA, DOUGLAS B WA2009-05-30 → cancelled 2021-06-02
- TREMPER, DAVID A AK2022-01-28 → cancelled 2026-04-28