Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KL7GRM callsign genealogy
Currently held by TREMPER, DAVID A
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 KL7GRM's current licensee, walking backwards.
- TREMPER, DAVID AAKgranted 2022-01-28cancelled 2026-04-28
Successor callsigns
Callsigns held now by people who previously held KL7GRM.
- TREMPER, DAVID AAKgranted 2022-01-28cancelled 2026-04-28
All historical holders
Every license row we've seen with the callsign KL7GRM, oldest first.
- TREMPER, DAVID A AK2020-01-22 → cancelled 2022-01-28
- TREMPER, DAVID A AK2026-04-28 active