Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD6SPN callsign genealogy
Currently held by BLUM, JOHN 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 KD6SPN's current licensee, walking backwards.
- Notario, Sherwin PCAgranted 2015-11-23cancelled 2021-07-30
Successor callsigns
Callsigns held now by people who previously held KD6SPN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD6SPN, oldest first.
- BLUM, JOHN A CA1993-02-16 → cancelled 1999-11-30
- Notario, Sherwin P CA2021-07-30 active